# AfterMath

 Stop Looking for Superman — Posted Thursday September 23 2021 Oh Superman where are you now When everything's gone wrong somehow The men of steel, the men of power Are losing control by the hour. — Genesis, Land of Confusion (1986) Just months into his administration, President Biden is being blamed for all of America's faults, not only from conservatives but from his own party as well. Meanwhile, hideous moral monsters like Donald Trump cruise along, supported by willfully ignorant and stupid conservative fawns who've led us once again into another COVID-19 disaster: Case in point: former Trump national security advisor Michael Flynn is now claiming that Biden operatives are putting COVID vaccine into salad dressing, and Trumpists are swallowing the lie whole hog. God help us. As the Genesis song indicates, the human race has too many people doing too many wrong things. That was 35 years ago, but it applies even more today. With some 7.8 billion people on the planet now, all it takes is a tiny minority to ruin everything.

 Racist Hypocrisy — Posted Thursday September 23 2021 Gabby Petito—so young, so beautiful, so white$$\ldots$$so much more interesting and important than missing women of color. This happens on a regular basis—a beautiful, young white woman goes missing or is found murdered, and all the news networks drop everything to focus on her. Police, volunteers, helicopters, surveillance aircraft and all manner of other resources combine forces to solve the mystery, and Americans are glued to their television sets waiting for the latest news. Meanwhile, many more women of color undergo the same fate, but are ignored completely by the media. Yet Americans pride themselves as being beyond racism. It's all because of ratings, and the media know perfectly well that viewership depends heavily on the color of the unfortunates. Shame on us.

 Turtles — Posted Wednesday September 22 2021 And then, a sail appeared; it was The Rachel. The Rachel, who in her long melancholy search for her missing children found $$\ldots$$ another orphan. — Herman Melville, Moby-Dick Today I watched 1999's The Thirteenth Floor again for the first time since my wife passed away. It's based on the possibility that we're living in a computer simulation, programmed and run by future programmers (human or otherwise), and I still believe the concept has some merit, although I don't truly think it describes the reality of our world. The concept has some religious aspects I won't go into here, except to say that some fellow members of my church also believe it's at least possible. The 1999 film is based broadly on the 1964 story Simulacron-3 by American science fiction writer Daniel F. Galouye. It concerns the near future in which some computer programmers develop an artificial world inhabited by sentient people of their own design, all unaware that they're simulated. In the movie, one of the simulated characters discovers "it ain't real": Later, "real-world" programmer Douglas Hall takes his own trip and makes a similar disturbing discovery: Many philosophical articles have been written about the simulation hypothesis, including the possibility that it's not only just turtles all the way down but turtles all the way up as well. I've sometimes pondered the possibility that the linkage is somehow circular, so that the simulations all derive from one another, and that nothing is either real or unreal.

 Coincidence? — Posted Thursday September 16 2021 Once is happenstance, and twice is coincidence, but three times is enemy action. — Auric Goldfinger In quantum mechanics, anything that is allowed to happen, no matter how improbable, will happen. This is encapsulated in the Quantum Totalitarian Principle of Murray Gell-Mann, the late Caltech physicist and winner of the 1969 Nobel Prize in Physics, which states that "Everything that is not expressly forbidden is compulsory." And according to the so-called Law of Truly Large Numbers, even the most outrageously improbable event imaginable is likely to occur at some time. For example, over the complete history of our race some 110 billion human beings have lived out their lives and, with the countless events they've witnessed, at least a few seemingly impossible events will have taken place. Barring acts of God or clever tricks by humans, they can all be dismissed as coincidences. Some forty years ago, the Japanese particle physicist Yoshio Koide discovered a formula that many scientists believe simply must have a scientific explanation. Given the currently known masses of the electron $$m_e$$ and its identical (with the exception of mass) cousins the muon $$m_\mu$$ and the tau $$m_\tau$$, Koide's formula is $$\frac{m_e + m_\mu + m_\tau}{\left( \sqrt{m_e} + \sqrt{m_\mu} + \sqrt{m_\tau} \right)^2} = 0.666661\ldots \approx \frac{2}{3}$$ The slight difference from the exact 2/3 figure can be completely attributed to the uncertainties in the known masses. These uncertainties were larger when Koide first made his observation, but the formula has continued to converge on 2/3 since that time. It is entirely possible that with more accurate mass measurements, the formula will indeed be precisely 2/3. The formula may still be just a coincidence, but if improved measurements of the masses of these particles are able to add two or three more 6's to the formula, then physicists will likely have to accept the fact that new physics is involved. This is the take according to astrophysicst Ethan Siegel, who discusses the formula in his latest online article. But I have an even bigger question: how in the world did Koide come up with this crazy formula in the first place?!

 Pretty Neat — Posted Friday September 10 2021 The Pasadena area experienced a great lightning and thunderstorm last night, sadly without much of the rain we so desperately need. But on my walk this morning I was pleasantly greeted with this sight, something I haven't seen in ages. It's no big deal in many parts of the country, but rare around here.

 The Night of the Hunter (1955) Documentary — Posted Wednesday September 8 2021 The acclaimed actor Charles Laughton directed only one film, which was 1955's The Night of the Hunter starring Robert Mitchum, Shelley Winters, Lillian Gish, Peter Graves and James Gleason. The movie was not a financial success when it was first released, but it has since become a classic noir-ish film with subtle sexual and religious motifs and overtones. The plight of the two children, desperately fleeing a homicidal maniac played brilliantly by Mitchum (in his favorite role of all time), underscores the recurrent theme of innocence fighting off the evil of the world while surrounded by hapless adults who are either unaware of the evil or are unable to recognize what is going on around them. This morning my older son alerted me to this recent 2 hour, 40 minute YouTube documentary, in which Laughton is depicted discussing the film and directing the actors during various outtakes and scenes. It's brilliant, and I'm so grateful that it's now available for viewing. (Thanks, Kristofer!) At one point in the film, an exhausted, sleep-deprived John (played by Billy Chapin) is awakened in the dead of night by the idle singing of the pursuing killer, who always seems to be just one step behind John and his younger sister Pearl. "Don't he never sleep?!" he intones to himself, which to me represents the constant threat of unrelenting evil that pervades our world. Mitchum's repeated rendition of the old Gospel hymn "Leaning on the Everlasting Arms" is both charming and malevolent at the same time, and once you've seen the film the hymn will never sound the same again. Don't miss the film or the video.

 Nuts on the Proof of the Gatic Theorem — Posted Saturday September 4 2021 The late cartoonist Gahan Wilson was a favorite of mine in the 1970s, and his NUTS series was a great take-off on the Peanuts strip. I remember this one, as it reminds me of Miss Woods' high school geometry class. I was never sick in high school, but I swear every day in her class was like this one.

 Hossenfelder Again — Posted Saturday September 4 2021 I apologize for posting yet another of German physicist Sabine Hossenfelder's videos, but she addresses an issue that many cosmologists have been questioning for the past few decades, which concerns the validity of the Cosmological Principle. In short, the principle states that if one looks out at great distances, the universe appears to be both isotropic and homogeneous—that is, wherever one looks, the density of matter and radiation appears to be uniform. The Cosmological Principle is a bedrock assumption in standard cosmology, because it's really the only way the dynamics of the universe can be understood analytically. For example, the Friedmann equations (which to date have been remarkably accurate in describing the dynamical universe) could not be derived from Einstein's general relativity theory without the simplications that the Cosmological Principle provides. As Hossenfelder points out in the video, recent research has shown that if the Cosmological Principle does not hold absolutely, then the assumed existence of dark energy (and possibly dark matter) might be invalid. A universe completely devoid of dark energy and dark matter would most likely halt its observed expansion and recollapse in the distant future, possibly resulting in a new Big Bang. I've always wondered if the Cosmological Principle might be made more realistic if some kind of clumpiness or non-uniformity could be embedded in the formalism, perhaps by introducing some sort of random "fuzziness" in the large-scale distribution of matter and radiation. Maybe this kind of adjustment would explain the divergence seen in Type 1a supernovae data, which seems to imply that the universe is expanding at an accelerated rate. Indeed, the following graph published in 1999 won its researchers the 2011 Nobel Prize in Physics. Just wondering.

 A Discovered Notebook — Posted Wednesday September 1 2021 I met my future wife Munira when she joined our laboratory in May 1972. She would usually sit alone eating her lunch and reading the Bible, but on occasion she would read from an old, tiny book that had wood covers. Later I learned that the book was The Imitation of Christ, written anonymously in the 15th century but usually attributed to one Thomas à Kempis. It was originally published in Latin, but has since been translated into many other languages. During lunch I would occasionally sit and chat with Munira in the little garden outside the lab. One day she loaned me the book, although at the time I could hardly consider myself to be a devout Christian. But I did read it, and returned the book to her in late 1972. I honestly didn't give it much thought at the time. When Munira died in July 2019 I found the book in her handbag, where without my knowledge she had carried it throughout our 42 years of marriage. Then yesterday, while going though some of her things in the garage, I found a copy of the Imitation of Christ that Munira had laboriously handwritten into one half of a notebook from her first year at the University of Cairo, Egypt in late 1963 (which is ironic—she started college the same year I started high school). She wrote it in English, her second language, and with some amusement I spotted a few grammatical errors that she made, although the context was correct. The other half of her notebook contained detailed notes she transcribed from lectures she had taken in her first year at university. Amazingly (to me), those notes were from her first physics course, which included elementary atomic physics. So there was my future wife, studying calculus-based physics when I was just getting comfortable with Algebra I in high school. In fact, I never took physics in high school, despite being fascinated with the subject from an early age. I now treasure these notes from my dear late wife, who went on to earn a Master's Degree in chemical engineering while maintaining her Christian faith throughout her life. And I consider the juxtaposition of her physics notes with The Imitation of Christ to be a moving and very profound message to me from her spirit, and I am deeply moved. Three months ago I was ordained a deacon in the Coptic Orthodox Church, the same church my wife grew up with in her native Egypt. During our marriage we attended the church only infrequently, but now it's a lifeline for me as well as an ongoing connection with her and with the Christ she loved. With God's help I hope to join her again someday in the Kingdom of Heaven.

 The Chandrasekhar Limit — Posted Monday August 30 2021 In 1930, the brilliant Indian physicist Subrahmanyan Chandrasekhar derived the theoretical limit of how massive a star can be without collapsing into a white dwarf, a neutron star or a black hole. That limit today is about 1.44 solar masses, and of the hundreds of white dwarfs and neutron stars observed to date, none have exceeded the limit, confirming Chandrasekhar's work. I lost interest in stellar physics years ago, mostly because Chandrasekhar's mathematics was just too daunting. But here's a wonderful new YouTube video on the derivation of a decent estimate of the Chandrasekhar limit involving mostly just algebra: I find it interesting that Chandrasekhar's limit was ignored for decades, mostly because of the refusal of colleagues to believe it was valid. But in time they did, and in 1983 Chandrasekhar was awarded the Nobel Prize in Physics for his work. I can't help but feel that at least some of the difficulties he faced had to do with the same racist attitudes the similarly gifted Indian mathematician Srinivasa Ramanujan had to deal with. On the basis of a series of brilliant but unsolicited calculations he sent to the noted Cambridge mathematician Godfrey Hardy, and almost out of curiosity Ramanujan was invited to England by Hardy. Hardy became Ramanujan's mentor, but the racist attitudes and cultural differences Ramanujan had to endure in England were profoundly difficult for the young man, and he died at the young age of 32. A decent overview of Ramanujan's life can be glimpsed in the 2015 film The Man Who Knew Infinity.

 Gone 25 Months — Posted Saturday August 28 2021 And now I'm lost, so gone and lost Not even God can find me. — They Call the Wind Maria

 Siegel on Dark Energy — Posted Thursday August 26 2021 This recent Medium article by astrophysicist Ethan Siegel deals with the nature of dark energy and its possible effects on the future of the universe. Dark energy is represented by the cosmological constant $$\Lambda$$ in Einstein's gravitational field equations, given by $$R^{\mu\nu} - \frac{1}{2}\, g^{\mu\nu} R + \Lambda g^{\mu\nu} = \frac{8 \pi G}{c^4}\, T^{\mu\nu} \tag{1}$$ The standard model of cosmology says that as the universe expands, ordinary matter (including dark matter) and radiation get diluted, but dark energy is actually created with constant density $$\rho_\Lambda$$. Dark energy has a kind of antigravity effect, so as the universe gets bigger the antigravity effect grows, resulting in the runaway, accelerated expansion of the universe. If the standard model is correct, and if $$\Lambda$$ is truly a constant, then the universe will definitely expand without bounds forever. Consequently, matter and radiation will become so diluted that the universe in effect will simply disappear into a bleak nothingness. But Siegel raises the possibility that $$\Lambda$$ may not be a true constant—it may increase in strength or grow weaker with time, with vastly different effects on the fate of the universe. I've always felt that the $$\Lambda g^{\mu\nu}$$ term in Einstein's field equations was an easy plug-in, since the covariant divergence of (1) (which implies a kind of mass-energy conservation) is assumed to vanish. The metric tensor $$g^{\mu\nu}$$ is a constant under covariant differentiation, but if $$\Lambda$$ is not a constant but a differentiable scalar then all bets are off with respect to the model. Similarly, it is also possible that the metric tensor does not vanish under covariant differentiation. This is called non-metricity, and the concept has been around almost since the dawn of Einstein's general relativity theory. Even if the combination $$\Lambda(x) g^{\mu\nu}(x)$$ is somehow covariantly constant, the cosmological consequences of Einstein's equations would be radically different and far-reaching. Many theories have been proposed to date that examine these consequences, but as yet they have not agreed with observation. As the early 20th century astrophysicist Arthur S. Eddington once noted, "The universe is not only stranger than we imagine, it is stranger than we can imagine."

 Yes, Everything Vibrates — Posted Monday August 23 2021 German physicist Sabine Hossenfelder's latest blog was inspired by "two lovely ladies" who expressed their belief that they wouldn't contract COVID-19 because their personal "vibrational frequencies" are out of sync with that of the virus. I've heard of crazy beliefs like magnet therapy, homeopathic medicine, vaccine magnetization, astrological forecasting and other nonsense, but this one takes the cake. Hossenfelder's opinion mirrors mine, but she notes that there is some truth to the notion that "everything vibrates." This is true even at a temperature of absolute zero (0 Kelvin)—a particle at that temperature jiggles a tiny bit, due to the Heisenberg unceertainty principle. But I fear that Hossenefelder's guarded admission will be taken completely out of context by the women appearing in her video, assuming they bother to watch something on the Internet that does not feature the American flag, guns, Trump and competitive Krispy Kreme doughnut eating. Back in the late 1960s we had harmless hippie behavior like love-ins and navel gazing, but modern pseudoscience like vaccine avoidance and willful stupidity can have truly tragic consequences. If the estimated 30% or so of Americans opt not to get vaccinated (out of allegiance to Trump or preferences for hydroxychloroquine, Clorox injections or veterinary drugs), then the current and projected variants of COVID-19 will be with us forever.

 Airliner Disaster Over Duarte, or When World Lines Intersect — Posted Monday August 23 2021 I had long forgotten this event when I stumbled across this YouTube video, which describes an airline disaster that I witnessed back in June 1971. I left this comment on the YouTube site: I had just graduated from college, and was walking home to my parent's house in Duarte, California from the Alpha Beta supermarket when I heard a distant explosion. Looking east, I saw something plummet straight down from the sky. After dropping off my groceries, I drove to the Fish Canyon area of Duarte only to find that the roads had been blocked off by police cars. I returned home, turned on the TV and learned that it had been an in-flight collison between a commercial passenger jet and a military aircraft. Later, there were rumors that the military jet had been doing a victory roll just prior to the collision, but it was subsequently judged to be an evasive maneuver by the pilot. God save the souls of those who perished. In physics, a world line is the trace of one's life sequence through space and time. I find it tragically coincidental that the world lines of two aircraft might find themselves at the same point in spacetime. Since that day fifty years ago I have flown many times, but because of this event I still do not like flying.

 The Kal-Els at Home — Posted Tuesday August 10 2021 I fell in love with science (especially physics and chemistry) while reading comic books as a child in the late 1950s and early 1960s. Staple fare then was Superman, Superboy, Action Comics, Adventure Comics and World's Finest Comics. "Kal-El" was Superman's name on his home planet Krypton, which exploded due to an instability of the planet's core, minutes after Kal-El was saved by his parents Jor-El and Lara by shooting their young son into space via rocket. Kryptonians had no super powers because their sun was red, but when Kal-El landed on Earth he attained super powers due to our sun's yellow color. The remnants of Krypton were highly radioactive due to their conversion to kryptonite, but it was toxic only to Kryptonians. Pieces of Krypton occasionally found their way to Earth, providing many plot lines for the comic books. I never questioned the existence of a radioactive element such as kryptonite, although in 1962 I knew there were only 106 known chemical elements at the time. My 8th grade science teacher at the time was Mrs. Wilson, a real battle ax you really didn't want to mess with. She caught me talking in class one day, and demanded that I give her the number of chemical elements. To her surprise I answered correctly, but she told me never to speak in class again while she was talking. Mrs. Wilson was probably around 40 years old then. She had a big impact on my life, and I wonder what happened to her. By the way, names with "el" often have religious significance. It's related to the God of Judaism and Christianity, with Michael, Gabriel and Raphael being the principle angels of orthodox Christianity. Conversely, names with "bel" are often related to wicked paople, due to its connection to Baal, the pagan god of the ancient Canaanites and others. For example, Israel's 9th century BC King Ahab was seduced by Jezebel, who was ignomiously pushed out of a window, with her body eaten by dogs. Meanwhile, my name is Bill, and I can only wonder what disaster awaits me.

 Cuomo Resigns — Posted Tuesday August 10 2021 With some eleven women testifying that New York Governor Andrew Cuomo sexually harrassed them, Cuomo has resigned. Meanwhile, former President Donald Trump, accused by fifteen women of sexual harrassment and molestation, skates off unblemished. Something's wrong here, but the worshipers of Trump could care less.

 Learning Can Be Fun When You're Miserable — Posted Friday August 6 2021 First there was the COVID-19 alpha ($$\alpha$$) variant. Then the beta ($$\beta$$) and gamma ($$\gamma$$) variants came along, but they were minor players, as far as viruses are concerned. The delta ($$\delta$$) variant then came along, and it's currently all the rage (literally). Now there's news of the epsilon ($$\epsilon$$) variant, and even a lambda ($$\lambda$$) variant. It appears that America is gonna have to learn the entire Greek alphabet before (or if) this thing is over. If it doesn't end, I hope we'll start learning the Arabic alphabet, as I need the practice.

 Merritt's MOND Book — Posted Monday July 26 2021 I received my copy of David Merritt's 2020 book A Philosophical Approach to MOND (MOdified Newtonian Dynamics). At only 250 pages, it's a fairly quick and easy read (provided you have at least an undergraduate degree in physics and you skip over the book's preliminary philosophical stuff). I found that it deserves all the praise it has received from Germany's Sabine Hossenfelder and many others, although I don't think it will soon overturn the conventional Standard Model of Cosmology, which asserts that dark matter exists. MOND basically says that gravity acts a little differently than what's taught from the usual $$F = ma$$ point of view, with the gravitational force falling off as $$1/r$$ rather than $$1/r^2$$ at galactic distances. This means that at great distances stars will orbit their galactic centers at roughly constant speeds, which is what is observed for nearly every galaxy. Dark matter, on the other hand, accounts for these constant velocities by assuming the presence of dark matter "haloes" surrounding the galaxies, which preserves the usual Newtonian $$F= ma$$ force law. First proposed by Israeli physicist Mordehai Milgrom in 1983, MOND received aparse attention despite its ability to accurately predict stellar motions and other cosmological phenomena discovered in subsequent years. Its main drawback was that it was not a relativistic theory, although in later years such modifications to Milgrom's theory appeared that removed this constraint via extended versions of Einstein's general theory of relativity. Merritt's book presents three approaches to MOND. The first is Milgrom's basic idea (which seems to have been little more than an inspired guess). It's followed by a relativistic version developed by Milgrom and colleague Jakob Bekenstein. The third approach is a kind of mixture of MOND and dark matter, which Hossenfelder believes might be a dark matter superfluid. The Milgrom/Bekenstein theory came out in 1984, and to relativistically reproduce the successes of the original MOND theory they had to introduce a universal scalar field $$\psi$$ into the formalism. But a flaw in this theory led Bekenstein to a 2004 revision involving a vector field $$A_\mu$$ along with $$\psi$$ that he planted into the fundamental metric tensor $$g_{\mu\nu}$$. This in turn required the theory to now have the kinetic part $$F_{\mu\nu} = \partial_\mu A_\nu - \partial_\nu A_\mu$$, which looks a lot like the electromagnetic field tensor. The final theory, which appears as the expression given by Equation (6.19) in the book, now had at least five adjustable constant parameters, making it look (to me) a lot like curve fitting. Furthermore, the Ricci scalar $$R$$, which traditionally accounts for the gravitational field, is nowhere to be seen (at least I can't find it). By comparison, Milgrom's original theory had just one constant added parameter, $$a_0$$, which causes the gravitational potential to fall off more slowly. This reminds me of the theories of Hermann Weyl and Mannheim/Kazanas (which I have discussed many times elsewhere on this website), which look far more promising. Still, the accounts of the successes of MOND described in detail in Merritt's book are hard to overlook or dismiss, and I'm even more convinced that a consistent relativistic version of MOND will eventually prove that dark matter is nothing more than a convenient myth.

 Two Years — Posted Sunday July 25 2021 Today marks exactly two years (104 weeks) since my dear wife Munira passed away. I'm trying to move on, get off the Prozac and the grief therapies, but it's just not happening yet. Here we are on her 45th birthday in 1991: May God bless you and keep you always, dear Mimi, as I await and pray for the day when I will see you again in Heaven.

 The Party of "NO" — Posted Wednesday July 21 2021 The Republican Party, spearheaded by Kentucky Senator Mitch McConnell and Texas Senator Ted Cruz (but really dominated by the disgrunted and still very dangerous ex-president Trump), has become the party of "NO," determined to block all of President Biden's plans to reinvigorate the economy, deal with climate change and infrastructure issues and everything having to do with serious COVID-19 mitigation. This situation reminds me of my favorite opera of all time, the five-act Italian opera Mefistofele, composed by Arrigo Boito in 1868. It's based on the famous story of Goethe's Faust, a scientist who sells his soul to the devil in exchange for beauty and knowledge. The opera includes the famous "Whistle Aria," in which the devil reveals his true nature: I am the Spirit who denies Everything always: the stars, the flowers. My sneering and hostility Disturb the Creator's leisure. I want Nothingness and the Universal ruin of Creation. My vital atmosphere is What is called Sin, Death and Evil! I laugh and snarl this monosyllable: "NO" I destroy, I tempt, I roar, I hiss: "NO" I bite, I ensnare, I destroy, tempt, roar, hiss. I whistle, whistle, whistle, whistle, eh! [whistles loudly] I am part of the innermost Recesses of the great All: Obscurity. I am the Child of Darkness! What an appropriate description of today's Republican Party.

 Why Distance and Size Don't Matter — Posted Wednesday July 21 2021 Science writer Ben Brubaker talks about Bell's inequality in today's online Quanta Magazine, where he summarizes the notions of locality and non-locality of events in spacetime, and how the late physicist John Bell destroyed the idea that two events occurring far apart cannot take place simultaneously. Bell's inequality has since been demonstrated many times experimentally. Some years ago I showed that the inequality is truly violated in elementary quantum mechanics, and that two distant but entangled events can indeed occur at the same time. [There is one simple way to show that this is true for one extreme case. The distance or interval between two events is expressed by the invariant line element $$ds$$, which in Cartesian coordinates is given by $$ds^2 = c^2 dt^2 - dx^2 - dy^2 - dz^2$$ At the speed of light, $$ds = 0$$, which means that physical distances (and time itself) become meaningless. If you were a photon, you would perceive yourself as existing everywhere in the universe at the same time, and in this sense you would be immortal as well since you would not perceive the passage of time at all. This might seem to be a paradox to a human, since turning on a light and letting the photons impinge on your cornea would make it seem that a photon is born at one instant and destroyed shortly later. Thus, to a human a photon's lifetime is finite, while the photon would see itself as having no birth or death. But this is nothing but the famous twin paradox taken to its ultimate extent.] But all this made no sense to Einstein, and he tried to prove it in 1935 in a famous paper he wrote with collaborators Boris Podolsky and Nathan Rosen. It was not a proof, exactly, as Einstein simply argued that the concept of locality prevented the effects of one event from affecting a distant event faster that the speed of light. But quantum mechanics asserts that two entangled particles are in the same quantum state, and so the distance between the two makes no difference. I see this as meaning that the physical distance between two events in spacetime is in a sense meaningless, and since distance is a measure of the size of an object, the concept of size is essentially meaningless as well. This is the gist of a theory proposed by the German mathematical physicist Hermann Weyl in 1918, in which he asserted that distance between two points in spacetime is affected by the path that one takes to get from one point to the other. It was Weyl's initial intention to show that the path is affected by a combination of gravitational and electromagnetic fields, but this idea was quickly overturned by Einstein himself. It was subsequently shown in 1929 that Weyl's idea applied not to gravity but to quantum theory as the principle of gauge invariance. Gauge invariance is now a fundamental cornerstone of quantum physics, where it is believed to lie at the basis of all physics.

 David Merritt on Dark Matter — Posted Tuesday July 20 2021 David Merritt, former professor of physics at Rochester University, writes in Aeon Magazine that it's about time that the standard model of cosmology begins to accept the very real probability that dark matter, like the late 1880s idea of the luminiferous aether, simply does not exist, and should be replaced by a relativistic version of modified Newtonian gravity (MOND). Merritt's 2020 book on the subject, A Philosophical Approach to MOND, has received great reviews, along with the support of notable physicists like Germany's Sabine Hossenfelder. I purchased Merritt's book from Amazon, but I haven't received it yet. However, from what I've read about it so far I tend to be in complete agreement with his views. Einstein's gravitational field equations are traditionally derived by a variation of the simple action quantity $$S = \int \!\! \sqrt{-g}\, \left( R - 2\Lambda \right) \, d^4x$$ where $$R$$ is the Ricci scalar and $$\Lambda$$ is the cosmological constant, with $$R$$ being a function of the fundamental metric tensor $$g^{\mu\nu}$$ and its derivatives. With $$T^{\mu\nu}$$ being the energy-momentum tensor representing mass-energy, the variation yields Einstein's field equations $$R^{\mu\nu} - \frac{1}{2}\, g^{\mu\nu} R + \Lambda g^{\mu\nu} = \frac{8 \pi G}{c^4}\, T^{\mu\nu}$$ where $$R^{\mu\nu}$$ is the ten-component Ricci tensor (in most applications, $$R^{\mu\nu}$$ and $$T^{\mu\nu}$$ have only the four non-zero diagonal components $$R^{00}, R^{11}, R^{22}, R^{33}$$ and $$T^{00}, T^{11}, T^{22}, T^{33}$$ ). Solution of the four associated differential equations yields fantastically successful predictions of planetary motion, the deflection of starlight, gravitational lensing and gravitational redshift, all of which have been observed to nearly prefect precision. But observation of certain galactic-scale phenomena (stellar velocities and galactic clustering) indicates that there is more matter than can be accounted for, which has led to the now-accepted notion of dark matter to account for the missing mass. Einstein's field equations are still valid, but the now decades-long search for dark matter particles and/or fields has come up completely empty, leading to the idea that dark matter does not in fact exist and that Einstein's gravity theory needs to be modified. I'll comment on Merritt's book once I've read it, but I've long believed (like Einstein himself) that Einsteinian gravity theory is only an approximation of the truth. To me, relativistic MOND is a step in the right direection.

 Recent Stuff — Posted Wednesday July 14 2021 Here's a recent paper by some Russian physicists on some cosmological aspects of Hermann Weyl's 1918 gravity theory, which suggests that the Weyl vector $$\phi_\mu$$ might have something to do with dark matter. I think it's rather far-fetched, but then I once believed that Weyl's theory was at least partially true (it may still be), but I never connected it with dark matteer (which I don't believe exists). Meanwhile, I'm reading German physicist and neuroscientist Alexander Unzicker's 2015 book Einstein's Lost Key, which posits that if the speed of light were not an absolute constant (an idea that Einstein thought might hold some water) then notions like early cosmological inflation theory might be wrong. This idea piggybacks on some other notions that the Newtonian gravitational constant $$G$$ might vary with time (which Paul Dirac once proposed) or that the fine structure constant $$\alpha$$ might vary as well. Such ideas have never been demonstated experimentally, and I've always thought they were crazy, but then we humans have only been around a relatively short time, so we wouldn't be able to detect the changes even if they did occur. Here's a YouTube video posted by Unzicker on the ideas he proposes in his book. It's interesting, along with many of his other videos, but I've always wondered who he's lecturing to, as his audience is never shown.

 McGaugh on Dark Matter — Posted Monday July 12 2021 Noted observational cosmologist Stacy McGaugh of Case Western Reserve University has long railed against the conventional belief that dark matter exists, despite hundreds of millions having been spent so far to detect it experimentally. It supposedly doesn't interact with anything (including itself) except gravity, and is otherwise invisible, tasteless and odorless, yet it somehow accounts for some 80% of all the matter in the universe. A whole slew of ideas have been proposed regarding its nature, including cold neutrinos, sterile neutrinos, axions and massive photons, although pixie dust has presumably been eliminated. McGaugh leans toward modified gravity theories as the preferred alternative to dark matter, the simplest version of which is modified Newtonian dynamics (MOND). There are many different types of modified gravity, all based on Einstein's original theory of general relativity, and many of these theories agree with observations, with some important shortcomings. The advantage of dark matter is that it can be made to agree with observations by simply sprinkling it around here and there to make it agree. McGaugh's latest post on the subject appears on his website Triton Station, along with many earlier posts on the same topic. He also composed the following graphic, which perfectly summarizes my own views on dark matter, which forms half of the lambda-cold-dark-matter ($$\Lambda$$CDM) model of modern cosmology:

 Ruben Bolling Does It Again — Posted Saturday July 3 2021 There's so much packed into this strip that I can't begin to summarize it.

 The Consequences of Infinite Energy — Posted Saturday July 3 2021 I took a single graduate class in cosmology/astrophysics many years ago, and remember not liking it at all. Now it seems it's all I think about. Here's physicist Sabine Hossenfelder (again) talking about cosmological inflation, energy non-conservation in general relativity and the creation of baby universes. It's true that the old high-school law of energy conservation does not hold in general relativity, which to me means that infinite energy is always available, an idea that I immediately attribute to the Almighty Creator. In a nutshell, here's why energy conservation does not occur in general relativity. The ten Einstein field equations are given by $$G^{\mu\nu} = R^{\mu\nu} - \frac{1}{2}\ R g^{\mu\nu} + \Lambda g^{\mu\nu} = \frac{8 \pi G}{c^4}\, T^{\mu\nu}$$ where the covariant divergence (you'll have to look that up) of both the Einstein tensor $$G^{\mu\mu}$$ and the energy-momentum tensor $$T^{\mu\nu}$$ vanishes. This indeed implies conservation. But true mass-energy conservation is dependent upon the vanishing of ordinary partial differential divergences. This difference is profound and irreconcilable, so mass-energy is not conserved. Bottom line: don't worry where the energy comes from. It just comes.

 If You're 72 Like Me, It's Later Than You Think — Posted Thursday July 1 2021 It's July already?!

 Sketchy Data — Posted Thursday July 1 2021 An ancient human-like skull has come to light. What did its owner really look like? We've all seen forensic reconconstructions of faces associated with ancient and modern skulls, often in attempts to identify unknown murder victims. Forensic scientists and artists use their skills to reconstruct the faces, but how often have you seen comparisons of the reconstructions with actual photos of the victims? Almost all of the time there's very little real resemblance other than agreement with cursory or basic facial features. It's the same story with artists' sketches of criminals based on eye witness descriptions. Sketchy data often leads to sketchy facts. I often find myself coming back to the following graph, which is now over twenty years old. It also involves what I consider to be sketchy data: The work behind this graph won its researchers the Nobel Prize in Physics in 2011. It basically says that the farther away certain standard candles (known as Type 1a supernovae) are from us, the fainter they should be based on what the Standard Model of Cosmology was telling us back in 1999. The data begin to diverge from the expected straight line at great distances, implying that the expansion of the universe is accelerating with time. This phenomenon has been linked to dark energy which, if constant, may result in the so-called Big Rip, a point in the very distant future in which stars, galaxies and even atoms will be torn apart by cosmological expansion. Although I believe that dark matter is likely non-existent, I do believe in dark energy, which Einstein's prematurely disregarded cosmological constant $$\Lambda$$ is based upon. It's really only a matter of whether $$\Lambda$$ is truly constant, or increasing or decreasing with time. But like facial reconstruction, I've not seen any significant improvements in the data that the above graph summarizes. There's simply just too much scatter in the data points at high red shifts, and the exact nature of Type 1a supernovae itself is not precisely known. For example, the metallicity of pre-nova stars (the abundance of elements in the stars beyond hydrogen and helium) must surely influence their characteristics during supernovae events, such that the assumed 1.44 solar mass limit (see my previous post) is violated to some extent. Nevertheless, the validity of the Type 1a model is generally accepted, and is now part of the $$\Lambda$$CDM ("lambda-cold-dark-matter") model of modern cosmology. I find this perplexing, because despite enormous theoretical research and experimental efforts, no one still has any real idea what dark energy and dark matter might be.

 The Straw That Breaks The Cosmic Camel's Back — Posted Tuesday June 29 2021 A cold, incoherent object that exceeds approximately 1.44 solar masses will collapse in on itself, creating one of two possible remnants—a neutron star or a black hole. A black hole is a simple object that contains only mass, angular momentum and possibly electric charge (although instreaming charged particles would eventually cancel the hole's net charge). By comparison, a neutron star is highly complex, consisting of a thin atmosphere of stray neutrons and a solid crust, mantle and core of unimaginably dense neutronium (in actually, an element with an atomic number of zero!) The star would also likely be spinning at a high rate, a consequence of the conservation of angular momentum of the uncollapsed star. The gravitational pull of the star is so strong that even the slightest imperfection on its surface would be smashed flat, something akin to a microbe on the surface of a bowling ball. The extreme pressure at the star's core constitutes a form of gravity which, combined with the star's already incredible gravitational compressive force, is simply mind-boggling. But should the star somehow gain sufficient mass to exceed the 1.44 solar mass limit (via infalling matter such as interplanetary gas, planets, asteroids or other material), it is then expected to collapse into the comparatively featureless object we call a black hole. All ordinary massive objects obey an equation of state (EoS), which simply relates the object's density to its internal pressure. The familiar ideal gas law $$PV = nRT$$ is an EoS, but for solids it can be much more complicated. Indeed, no one knows what the EoS might be for a typical neutron star, assuming one even exists. It is easy to imagine a neutron star that's right on the cusp of becoming a black hole. Might dropping a paper clip on the star result in its collapse? Unlikely, as the star's EoS is probably forgiving enough to prevent it. But just how forgiving can it be, since the star must certainly be gaining mass over time as it absorbs infalling matter? One wonders how neutron stars can exist at all, since the 1.44 solar mass limit must surely be reached over reasonable cosmic time periods. Perhaps most neutron stars are so far below the limit to begin with that it would take many billions of years for them to accrete sufficient matter to become black holes. Now astrophysicists have detected two instances of a neutron star "accreting" a black hole, with the stunning result that the black hole simply swallows the star whole, leaving a more massive black hole and a huge outgoing gravitational wave. Such waves have now been discovered, and an even more interesting example of gravitational astronomy has been given to us.

 Hossenfelder on Coincidences and Conspiracies — Posted Saturday June 5 2021 If you have a grid of evenly spaced straight lines on a piece of paper and you toss a bunch of needles on the paper, you can approximate the value of the transcendental number $$\pi$$ by counting the number of times the needles land on the lines. Non-mathematicians may wonder how $$\pi$$ shows up in this exercise, but it's not a coincidence. Noted German physicist Sabine Hossenfelder's latest video addresses the coincidence issue via the notions of human pattern identification and false positives, explaining how and why we tend to assign underlying agenticity and conspiracies to purely coincidental events, much like the Peanuts gang's interpretation of overhead clouds: Hossenfelder's talk is one of the best I've seen, and it explains a lot about the foibles and tragedies of human behavior, in particular the sad predominance of weak-minded right wingers to persistently believe in PizzaGate, the drinking of children's blood by Democratic Party leaders and similar crazy conspiracies actively or passively promoted by the Republican Party.

 AI Lincoln — Posted Monday May 31 2021 I have an old book called The Lincoln Reader that I've had forever that relates many personal stories and anecdotes about Abraham Lincoln, my favorite president. Although he lost a chunk of his lower jaw during a molar extraction in the early 1840s, those who knew him said he had a fine set of healthy white teeth and frequently smiled, often when telling an off-color joke. Early photos of the day almost never showed people smiling, a consequence of the proprieties of the times and the fact that early photography usually took several seconds to minutes to capture an image. So people would just sit there, motionless and expressionless, and that's the way we see them today. With the advancing technology of artificial intelligence we now have relatively accurate ways of showing people in old photos as they might actually have appeared. Here's a new YouTube video that shows a smiling Lincoln, along with varying hair styles. Enjoy. Sometimes artificial intelligence doesn't work too well. George Washington wore almost full dentures in his later years, sporting false teeth fashioned from human, horse and cow teeth. Here he looks just like Soupy Sales in drag.

 Fine Tuning — Posted Saturday May 15 2021 In his latest video, YouTube's "Who Gives a Bleep?" Arvin Ash talks about the fine-tuning argument, which deals with the nature of the fundamental constants of our universe, such as the gravitational constant, the fine-structure constant, the magnitude of elementary electric charge and many other parameters that govern the workings of the observable universe. The problem involves the realization that if these constants were only slightly different (either individually or collectively), the universe would either not exist or would not be capable of creating or sustaining life. It's a short video, and well worth watching: As I see it, there are only two possibilities: either there is a creator (God or an external entity such as a computer programmer in a simulated universe), or the multiverse theory (or the many-worlds interpretation of quantum mechanics) is valid, in which case there are numerous (possibly infinite) universes each having varying fundamental constants, and we just happen to be living in one in which life is possible. Perhaps the most important aspect of Ash's talk is his assertion that we cannot talk about the probability of which argument is right, since we have no statistics available to base a probabilistic argument (we observe only one universe, and a sampling size of one is insufficient to do any calculations). This situation perfectly mirrors the familiar "science vs religion" argument, and it's unlikely that we'll ever be able to resolve it (but perhaps both are true).

 The Goat Problem $$\ldots$$ Again — Posted Friday May 7 2021 If you tie a goat to the outside of a barn and let it graze, how much grass can it clear? This might have been a practical math problem centuries ago, but Quanta Magazine seems to think it's still relevant today. What's interesting is that the problem becomes much more difficult if the goat is tied to the inside of a closed barn, regardless of the barn's shape. That couldn't have been much of a problem way back when, but it's still occupying mathematicians today. I addressed the problem of a goat in a circular fenced yard on December 11 last year, but now Quanta has upped the ante with a square yard. This time I didn't bite, but you can try it yourself if you have nothing better to do this weekend.

 More Geek Stuff — Posted Friday April 30 2021 German physicist Sabine Hossenfelder's views on dark matter vs modified gravity have changed. For the details, you can watch her latest video on the subject here. For the few who care about such things, back on March 27 I posted some comments on a recent paper claiming that the Mannheim-Kazanas (MK) spacetime metric did not predict flat stellar rotation curves in galaxies. I disagreed, and I've been waiting for Philip Mannheim to publish a rebuttal. But now there's another paper that supports the claim that the MK spacetime does indeed predict flat rotation curves by analyzing the effective potential associated with the metric. In the paper's analysis, the $$\gamma$$ term plays an important role in defining the radius at which stellar velocities approach constant values far from their galactic centers. This radius is the same one I came up with. The MK metric is the only spacetime I've seen that is free from any added parameters (such as scalar and vector fields) that reproduces the predictions of the standard Einstein field equations. Like the Einstein-Hilbert action, that of the MK action (first derived by Hermann Weyl 100 years ago), is pure geometry.

 Alien Visitation — Posted Saturday April 24 2021 There are countless YouTube videos depicting UFO sightings, and there's an equal number of people claiming they've been abducted by extraterrestrials for experimental purposes. Writer Devan Taylor talks about the difficulties associated with interplanetary visitation by advanced alien species, perhaps the biggest being "Why the hell would they come here in the first place?" If extraterrestrials could ever visit Earth, there are only a few possible scenarios. One, they're malevolent, in which case we're already toast, since they would obviously be far more technologically advanced than we are (discounting the entertaining but otherwise preposterous Independence Day film); two, they're benevolent, in which case we'd have already made contact with them; and three, they're just unobtrusive observers, in which case we have today's current situation. I personally believe there is intelligent life out there, but we'll never make contact with them because they're just too far away and just too darned spread out, so stop thinking about UFOs, aliens and all that nonsense. But meanwhile you can muse over the purely imaginary value of alien visitation, as depicted in this video clip where the Simpsons get abducted (obviously, aliens will need to have powerful tractor beams):

 What's Up with the Arizona Ballot Audit? — Posted Saturday April 24 2021 The Arizona Republican Party has hired a right-leaning Florida-based company called "Cyber Ninjas" (I kid you not) to assist in the audit some 2.1 million ballots in the state that were cast during the November 2020 presidential election. Although no irregularities have been reported, the Arizona GOP just wants to be sure that Biden won fair and square. Reports immediately surfaced that the auditors were illegally using blue and black pens to verify the ballots, in violation of the state's audit rule that only red pens may be employed (only red pens may be used, because computer scanners will falsely count any ballots illegally modified with black and blue pens). When the violation was reported by an Arizona reporter, auditors switched to the red pens, after which the reporter was banned from the audit site. I bring up this story because on April 20 I posted some thoughts on data fluctuations and their significance. When it comes to counting election ballots, there will always be a few innocent mistakes, such as human and computer counting errors, damaged ballots and other systematic and non-systematic errors. Typically, if these mistakes account for less than a tiny percentage of the total count, then the election is declared fair. If not, one or more recounts may be requested. In the Arizona case, no such irregularity was seen, but Arizona Republicans decided to proceed with a recount anyway, just to be "sure." Given the fact that the Arizona ballot hen house is now under watch by Republican foxes, it will be interesting to see how the recount ends. They don't have to falsify enough ballots to give Donald Trump the victory in the state, just enough to declare the election invalid. This would then spread to other Red states with anticipated similar results, giving the GOP the chance to declare Biden a fraudulently elected president. I sincerely believe this is their game plan. America may see a new Civil War after all.

 Is It Something I Said or Did? — Posted Thursday April 22 2021 Let us always guard our tongue, not that it should always be silent, but that it should speak at the proper time. — St. John Chrysostom It was June 9, 1962, the very last day of the 7th grade. Puberty had apparently hit the girls hard earlier that year, as they were all fawning over a classmate who'd been a good friend of mine for as lomg as I could remember. At morning recess the girls were all crowding around him with their cameras, and I felt jealous for the first time in my life ("Get out of the way, Bill, we want to take B's picture!") One girl in particular was practically foaming at the mouth over B, her hormones in overdrive, and in a moment of rage I blurted out "Susan, you make me sick!" Susan wasn't particularly attractive, and I certainly had no interest in her, but I resented her obsequious behavior over my friend. Near the end of the day, Cindy F. asked me why I was so mean to Susan, but I don't recall how I answered her. I just learned from an old classmate that some years later Susan committed suicide, having been clinically depressed ever since grade school. This news hit me like a sledgehammer, as I instantly recalled that day in 1962 and my heartless remark. Now I'm filled with remorse over something that happened almost sixty years ago and whatever part I might have played in that poor girl's demise. Watch what you say, because you might not have a chance to make up for it. An Inspector Calls, 2015.

 I'm Still Confused — Posted Tuesday April 20 2021 In 2001 the E821 experiment at Brookhaven National Laboratory in Upton, N.Y., found hints that the muon's magnetic moment diverged from theory. At the time, the finding was not robust enough because it had a statistical significance of only 3.3 sigma: that is, if there were no new physics, then scientists would still expect to see a difference that large once out of 1,000 runs of an experiment because of pure chance. The result was short of 5 sigma — a one-in-3.5-million fluke — but enough to pique researchers' interest for future experiments. — Scientific American You may have read about "5 sigma," the statistical criterion for determining whether a new scientific discovery is valid or not. Most recently, the magnetic dipole moment of the muon (a heavier but otherwise identical version of the electron) has been measured to great accuracy, but it differs very slightly from the theoretical value determined via quantum field theory. This difference is currently irreconcilable, and the difference amounts to something called 4.2 sigma. "Sigma" is a just a measure of the standard deviation, computed assuming the applicability of the normal (Gaussian) distribution to experimental measurements. It's just the area outside of the Gaussian curve for a given point on the left of the mean to the same point on the right of the mean, the points being standard deviations. For example, for a standard deviation of 3.3 the area under the curve in the range $$z = -3.3$$ to $$z = 3.3$$ for the Gaussian integral $$y = \frac{1}{\sqrt{2 \pi}}\, \int_{-3.3}^{3.3} e^{-z^2/2} dz \tag{1}$$ is about 0.99903. The area outside this range (($$1-y$$) is 0.00097, the inverse of which is 1,030. This is taken to mean that there is only about one chance in a thousand that the measurement is an erroneous, statistical fluke. Similarly, for a standard deviation of 4.2 (based on the latest muon data) the chances are only about one in 40,000 that the measurement is a fluke. What I don't understand is that all the reports are claiming that the 5 sigma "discovery" statistic means only one chance in about 3.5 million. But a straightforward calculation using (1) shows that this is only one chance in 1.75 million, exactly half of the number being reported. Is this a one-tailed or two-tailed thing? The answer is: it depends on whether you're calculating sigma or its cousin, the p-value, both of which are used in statistical analysis. So it's basically one-tailed vs two-tailed, no real difference, although I wish to hell they'd be consistent with what they're reporting. Update: German physicist Sabine Hossenfelder's latest video addresses the issue of sigma significance, noting that even 6 sigma can be misleading.

 Math For Fun — Posted Tuesday April 13 2021 For years I've watched the math videos that Steve Chow has posted on his popular YouTube channel Blackpenredpen, which mostly covers undergraduate-level calculus. Chow is an instructor at Los Angeles Pierce College, and while he doesn't have a PhD in mathematics he's the guy I wish I had I when was in school. Most of his videos present innovative and clever methods and tricks used to do seemingly impossible integrals, but he often changes gears and does purely algebraic problems. One of those that still fascinates me is the infinite tower-power problem $$x^{x^{x^{x^{\cdots}}}} = 2$$ (which, to the best of my knowledge, has no practical application whatsoever, but it's a fun problem). It's easy to derive the solution $$x = \sqrt{2}$$, but the seemingly easier finite tower-power problem $$x^{x^{x}} = 2$$ is far trickier. It turns out that the exponentiation process is not "commutative" in the sense that $$x^{(x^x)}$$ is not the same as $$(x^x)^x$$. In this video, Chow uses Newton's iterative method to solve for $$x$$, getting $$x = 1.476684\ldots$$. As is easily shown, however, the solution to $$(x^x)^x = 2$$ is just $$x=\sqrt{2}$$ (which is also the solution to the infinite tower-power problem), but this disagrees with Chow's solution. I'm puzzled by this, and I wonder if anyone can show me where I'm going wrong. Chow starts out the Newton's method with the guess $$x = 1$$, so perhaps that's a bad start to the process. Okay, I just found this video that explains everything. It's called tetration, which I knew about (but didn't know there was a rule for it).

 My Ignorance — Posted Thursday April 8 2021 Today is my late wife's birthday. She would have been 75, and it still breaks my heart that she is not here today. Here she is on her 60th birthday, as beautiful as ever. The last few days I've been going through boxes containing many hundreds of old letters that my wife and her brother received from (and wrote to) their parents and friends in Cairo, Egypt and in Kinshasa, Zaire, where my father-in-law taught chemistry. He took the job because it paid in American dollars (not Egyptian pounds), and was therefore a godsend, as it helped finance his adult children's emigration to America. They came to Los Angeles in 1970, as the weather was nearly the same as that in their native Cairo, and because they had a few friends in the church there to help them adjust to their new country. Munira and I were married 42 years, not counting the 5 years I knew her from before. Outside of some limited and very broken Arabic, I never learned the language, and while looking at the letters (all of which are 40 to 50 years old), I now much regret my ignorance, as I would love to read them now. I will be sending all of them to my wife's brother, the only one remaining in the family who can translate them. Hopefully, with his help I'll learn more about my wife's earlier years, although I also hope to see her again before too much longer.

 Is It God, or a "Smelly Hacker"? — Posted Thursday April 8 2021 There's currently a lot of puzzles in the physics world, but two stand out. One is the discrepancy in the Hubble parameter, which has been measured to pretty decent accuracy by two different methods that don't agree with one another, and the other is the measured and calculated magnetic dipole moment of the muon, which are also significantly different. The Hubble parameter is a measure of the expansion rate of the universe, and it's either about 67 or 73 kilometers per second per megaparsec. There's some error in the observed values, but the error bars don't overlap, hence the discrepancy. On the other hand, the measured and calculated magnetic moments of the muon (a much heavier variant of the electron) are extremely close to one another, but there is a slight difference that physicists cannot explain. It might be experimental error or a statistical fluke, but those explanations are considered highly unlikely. Physicists are hopeful that the difference points to new physics beyond the Standard Model of Physics. But there's another possibility, one that arises from the famous Simulation Hypothesis, which posits that all reality (including human consciousness) is the creation of an advanced computer programmer or hacker (smelly or not) who resides outside of the simulated universe. Assuming the hypothesis is correct, then even the most advanced programmer (perhaps even God) could not be precisely perfect in creating the simulation, and there would always be glitches that show up in the simulated universe, glitches that might be observable to the universe's inhabitants. This possibility is explored in this recent segment of Closer to Truth: In view of the large disparity between the calculated values of the Hubble parameter, I highly doubt that it's a glitch of any kind; more likely it's experimental error or an erroneous assumption in the Standard Model of Cosmology. The muon dipole moment problem is far more interesting, as the predicted value is based on highly reliable calculational methods that have been used to fantastic success in other applications. Could the one part in a million difference between experiment and calculation be a glitch, or could it be "new physics"? More advanced experiments are planned, so hopefully time will tell. PS: Sometimes I imagine that I'm a very old man, getting up in the morning, making coffee, then walking over to my large living room window to watch what's going on out there. What I see today is a fabricated Cretaceous landscape of herbivorous and carnivorous dinosaurs going about their business, thanks to a high-resolution, three-dimensional holographic glass pane that serves as my window to the world outside. Of course, the outside world is the usual boring place of cars going by and neighbors walking their dogs, and by turning off my fully programmable window I can see what's really there. But I prefer to gaze out upon the Grand Canyon, the Eiffel Tower or the Andromeda Galaxy, or if I choose I can watch the pyramids being constructed during Egypt's Old Kingdom. The possibilities are endless, and it makes me also wonder if my own existence isn't also a computer fabrication of some kind.

 The Waste Land (Television, Not T.S. Eliot) — Posted Thursday April 8 2021 I just can't watch cable TV news anymore (although I have AT&T TV, not cable), given the non-stop coverage of ugly politics, COVID-19, the ongoing racist treatment of minorities, perpetual mass shootings and all the rest. I put up a flat antenna on my wall and am now watching over-the-air (OTA) television programs, which don't cost anything. The local news is still depressing, but the number of available programs is about as good as basic cable TV. It's also given me the opportunity to tune into shows that my family and I watched in the 1950s, 1960s and 1970s, which were almost de rigeur viewing in those days because there wasn't anything else to watch. With the sole exception of The Honeymooners, all the shows are pathetically insipid, with paper-thin plots and nonsensical situations. The family-oriented sitcoms are the worst (Family Affair, The Partridge Family, Donna Reed, etc.), with their well-coiffed, squeaky-clean (and white) children and their invariably highly educated and successful parents (doctors, lawyers, architects, businessmen and engineers) posing as ordinary middle-income folks raising preposterously talented offspring who danced, sang, played instruments and put on fantastic stage shows. And of course no single parent was divorced back then (only widowed), thus preserving the sanctity of marriage. And also all the men had served in the military, which offered plenty of opportunity for the shows to feature patriotic tableaus of one sort or another, always to comedic and heartwarming effect. Good Lord, how much of that garbage did I consume without thinking in those days? I can only imagine how much better I'd have turned out if my parents had never purchased a television in the first place. "April is the cruelest month $$\ldots$$"

 Enough — Posted Monday April 5 2021 Truth be told, I'm sick to death of the non-stop Derek Chauvin trial coverage on CNN and MSNBC, not to mention the glib commentary by the various hosts of those news networks. The videos and testimonies of eye witnesses pretty much made the case against Chauvin for me, but the extensive trial coverage has become nothing more than a partisanized joke. The liberal-leaning CNN and MSNBC of course are pushing for a murder conviction, while the ultra conservative Fox News, One America Now and other racist networks are either playing the trial down or not covering it at all. Let's be honest here: if we could replace Derek Chauvin with a black police officer and George Floyd with an addicted white civilian who passed a counterfeit bill, the network biases would be reversed, and the trial would have ended long ago with the black police officer convicted of first- or second-degree murder. Instead, by dragging out the trial ad nauseam the justice system will be forced into a lot of hemming and hawing over who's guilty due to the various legal subtleties and medical minutiae that are being presented, with the result that there's a very good chance that confused jurors will be hung and Chauvin will walk. His police career will be over, but then he'll write a best-selling book and make repeated guest appearances on Fox News, so he won't be hurting financially. Fortunately, there's still a civil trial pending, and I can only hope that Floyd's family will end up getting a big chunk of whatever money Chauvin earns for the rest of his pathetic racist life.

 Come On, Feet, Don't Fail Me Now — Posted Wednesday March 31 2021 It has always killed me when lay people ooh-and-aah over the weightlessness of astronauts aboard the International Space Station, which orbits the Earth at some 17,300 miles per hour. At roughly 200 miles above the Earth's surface, the gravitational attraction is still over 90% that which we all feel here, and it's the orbital velocity and the associated centrifugal force that provides the weightlessness. So it's not outer space we're talking about, people, but the effects of orbital speed. It's easy to calculate that if you were to travel at about 17,700 miles per hour, you could orbit the Earth weightlessly at an altitude of 1 foot, barring collision with buildings, trees, Uncle Jack and other obstacles. General relativity states that time runs slower the closer one gets to a gravitating mass, a proven feature of the theory that is crucial to the functioning of the Globsl Positioning System (GPS) that our iPhones utilize to enable Google Maps (and for the National Security Agency to monitor our every whereabouts). So don't rob a bank with your iPhone in your pocket, as you'll be easily tracked down and arrested. It's a miniscule effect at Earth's surface, but as astrophysicist Ethan Siegel writes in his latest article, time really does run slower for your feet than your head because they're closer to the Earth. The effect would be much more pronounced at the surface of a neutron star, but then you'd be squashed flatter than an atom before you'd notice it. In fact, neutron stars are so smooth that even an irregularity the height of a human hair could be observed due to the wobble it would produce on the star's rotation, as explained in this fascinating Sixty Symbols YouTube video.

 Say It Ain't So, Matt! — Posted Wednesday March 31 2021 Today's Republican Party—Come for the tax breaks, stay for the paranoia, the lies, the hypocrisy and the pedophilia! That one may smile, and smile, and be a villain! — Hamlet Scene 1, Act 5 Hey, we've all sinned and fallen short of the glory of God, and I know I'm no different than anyone else. But we tend to hold our political leaders just a tad higher than ourselves, and when they fall short we expect them to come clean, admit their transgressions and repent. Sadly, that's not how it works in the Republican Party, where if you can lie and lie and get away with it, it's the same as telling the truth. Three days ago, 38-year-old Florida GOP Congressional representative Matt Gaetz appeared on Fox News' Tucker Carlson show to plead innocence over claims that he had sexual relations with a 17-year-old girl and had transported her over state lines for related purposes. I don't know for sure if Gaetz is guilty, but I especially enjoyed how he referred to the unnamed child as a 17-year-old "woman." I suppose that's better than a 12-year-old woman. Gaetz also claimed that his family was being extorted for $25 million to keep his guilt secret, noting that his father is wearing a wire to record the alleged extortionist's schemes. If true, it must be a pretty stupid extortionist to think that he/she can pull off the crime, given that it's now open to the public. It's also revealing that Gaetz and his family has that kind of money to begin with. The FBI is investigating both the allegations against Gaetz and the extortion claim, and only time will tell if the Trump-loving Gaetz will find himself in the dock. My guess is that he will, but with a suspended sentence, as it's probably only his fourth or fifth offense. He will then disappear for a while, be forgiven by his Republican backers and faith-based supporters, and then be restored to full Christian forgiveness. Want proof? Just remember the likes of Jimmy Swaggart, Jim and Tammy Bakker and Ted Haggard, just to name a few from a long list of Republican criminals and hypocrites.  Just Nip It, Mr. President — Posted Saturday March 27 2021 "Nip it! Nip it in the bud!" — Some slightly out-of-context (and off-color) advice from Deputy Barney Fife in his currently out-of-print bestseller, Nip It: Barney Fife's Guide to Blistering Hot Married Sex Pulitzer Prize winner Maureen Dowd's opinion piece in today's New York Times is a reminder to President Biden that the Republican Party despises his guts, and will never agree with any of his policies, regardless of how popular they are with your average Republican voter. Dowd writes "So while you're modulating, Mr. President, here's a suggestion: Ditch that old habit of yours, bending over backward to appease Republicans $$\ldots$$ Bipartisanship ain't happening now." I fully agree with Ms. Dowd. Biden is wasting his and his administration's time with all this talk about bipartisanship. Just look at the Republicans' current voting habits and their ongoing fawning allegiance to Donald Trump, whose lies and anti-democratic antics continue unabated. The current spate of Republican-led voting restriction bills and laws in Red States are proof that the GOP intends to never let the Presidency, House and Senate slip from their grubby hands again. If they could outright block blacks, Hispanics and Asians from voting, period, they'd friggin' do it. So just nip all that talk of getting Mitch McConnell, Ted Cruz, Rand Paul and their ilk to see the light, Mr. President, and go on an Executive Order rampage.  Geek Saturday — Posted Saturday March 27 2021 The classical Einstein-Hilbert action with a cosmological constant $$\Lambda$$ $$S_{EH} = \int\!\! \sqrt{-g} \, \left( R - 2 \Lambda \right) d^4x$$ has passed every experimental and predicted test of general relativity since Einstein proposed his theory in November 1915. However, in the weak-field limit they do not account for the observed near-constant velocities of stars on the outskirts of their galactic centers, which had led to the proposal that some kind of unobservable dark matter exists around galaxies and galaxy clusters. Assuming that dark matter does exist, then Einstein's theory still holds, so now the search is on for the illusive dark matter. It has been proposed that dark matter may consist of cold neutrinos, axions, massive photons and other exotic weakly-interacting species, all of which have not been detected despite herculean and costly experimental efforts over the past three decades. Einstein's action is fully Lorentz and coordinate invariant, but it is not invariant with respect to a change in scale, in which the metric tensor is varied according to $$g_{\mu\nu} \rightarrow \Omega(x)^2 g_{\mu\nu}$$, where $$\Omega$$ is an arbitrary function of space and time. In 1929, the German mathematical physicist Hermann Weyl showed that modern quantum theory demands scale invariance (later recognized as phase or gauge invariance) and that it accounts for the conservation of electric charge. Consequently, many physicists today believe that scale invariance should hold not only at the quantum level but on cosmological levels as well. In 1989, University of Connecticut physics professor Philip Mannheim and his colleague Demosthenes Kazanas proposed that Einstein's action should be replaced by a scale invariant version of general relativity that reduces to that of Einstein's under less general conditions. Again, it was Weyl in 1921 who derived a unique scale-invariant tensor quantity $$C^\lambda_{\,\,\mu\nu\alpha}$$ composed solely of the Riemann curvature tensor $$R^\lambda_{\,\,\mu\nu\alpha}$$ and its two contracted variants $$R_{\mu\nu}$$ and $$R = R^\mu_{\,\,\mu}$$, and Mannheim-Kazanas used the associated action $$S = \int\!\! \sqrt{-g}\, C_{\mu\nu\alpha\lambda}\, C^{\mu\nu\alpha\lambda} \,d^4x \tag{1}$$ to derive the equations of motion for free space in spherical coordinates. After what must have been laborious effort, they found the Schwarzschild-like solution $$ds^2 = e^\nu c^2 dt^2 - e^{-\nu} dr^2 - r^2 d\theta^2 - r^2 \sin^2 \theta \,d\phi^2, \quad e^\nu = 1 - 3 \beta \gamma -\frac{\beta(2-3\beta\gamma)}{r} + \gamma r - k r^2$$ where $$\beta, \gamma, k$$ are constants of integration. As is easily seen, for $$\gamma = k = 0$$ the solution reduces to the familiar Schwarzschild line element, where $$\beta$$ plays the role of the central gravitating mass. The terms proportional to $$r$$ and $$r^2$$ serve as acceleration parameters, which initially provided hope that scale invariance would provide an answer for dark energy and possibly for dark matter as well. Indeed, subsequent studies showed that the Mannheim-Kazanas metric accurately predicted the observed flat rotation curves for stars in many galaxies. Several days ago, a preprint paper appeared on arXiv.org claiming that the Mannheim-Kazanas metric in fact does not accurately predict flat rotation curves under generally assumed galactic conditions. The paper's Cambridge researchers (M.P. Hobson and A.N. Lasenby) showed that a clever coordinate change in the radial parameter $$r$$ could be used to eliminate the $$3\beta\gamma$$ and $$\gamma r$$ terms, thereby reducing the Mannheim-Kazanas metric to $$e^\nu = 1 - \frac{k_1}{r^\prime} - k_2 (r^\prime)^2 \, \,\,\, *$$ where $$r^\prime$$ is the new radial parameter and $$k_1$$ and $$k_2$$ are constants. This metric is equivalent to that of de Sitter spacetime, in which there is a cosmological constant (proportional to $$k_2$$) but with no matter in the universe (as our universe continues to expand, radiation and matter density will decrease to the point where the de Sitter metric will be perfectly valid). By eliminating the term linear in $$r$$ in the Mannheim-Kazanas metric, the Cambridge researchers show that the velocities of stars far from their galactic centers fall off like $$1/r$$ (in regions of interest for a typical galaxy) as in the pure Schwarzschild case, resulting in no region for flat rotation curves. It can be shown that the tangential velocity $$v$$ of a rotating star is given by $$v^2 = \frac{1}{2}\, r e^{-\nu} \frac{d e^\nu}{dr}$$ For the Schwarzschild metric, the velocity decreases inversely with distance, as is classically expected (and in disagreement with observation). However, the situation changes for the Mannheim-Kazanas metric. The velocity will be extremalized (maximized) when its derivative with respect to $$r$$ vanishes. With the reasonable assumptions that $$e^\nu \approx 1$$, $$\beta \approx GM/c^2$$ and $$\beta\gamma \ll 1$$, we get the condition $$\gamma r^2 - 2 k r^3 = \frac{2GM}{c^2}$$ Assuming further that $$k \approx \Lambda$$ (and so can be neglected), we find that maximum stellar velocities will occur at the radius $$r = \sqrt{ \frac{2GM}{\gamma c^2}}$$ Given the expected smallness of $$\gamma$$, this will be a very large distance from the galactic center, and is thus in agreement with observation. From this, I judge that the Mannheim-Kazanas analysis does indeed match the effects of dark matter. I'm studying the various galactic conditions that Hobson and Lasenby used to justify their conclusions but, as I'm not very familiar with galaxy dynamics, I cannot be assured that the assumptions I've made here are legitimate. I've long been a fan of the work of Mannheim and Kazanas (both their independent and joint research), and I can only hope that they can find convincing arguments rebutting the Hobson and Lasenby paper. PS: Einstein's full gravitational field equations are given by $$R^{\mu\nu} - \frac{1}{2}\, g^{\mu\nu} R + \Lambda g^{\mu\nu} = \frac{8 \pi G}{c^4}\, T^{\mu\nu} \tag{2}$$ where $$T^{\mu\nu}$$ is the energy-momentum (or stress-energy) tensor, which accounts for the presence of matter and radiation (which in turn affects the geometry). Einstein viewed the left-hand side (which is pure geometry) as being made of fine marble, whereas the right-hand side is cheap plastic (but matter and radiation have to be tacked on somehow, he reasoned). If $$S_M$$ is the action for matter and radiation, then $$T^{\mu\nu} = -2 \frac{1}{\sqrt{-g}}\, \frac{\delta (\sqrt{-g}\, S_M)}{\delta g_{\mu\nu}}$$ where the $$\delta$$ operator means "variation." It is easily seen that both sides of (2) have the dimensions of length$$^{-2}$$. But the Lagrangian in (1) is dimensionless, meaning that the proportionality term $$8 \pi G/c^4$$ would be unnecessary for a stress-energy that is also dimensionless. Go figure that out! * This is Equation (15) in the paper, which is the key identity in the reseachers' argument. I've been unable to derive it, and I wonder if it's correct.  Changes? We Don't Need No Stinking Changes! — Posted Wednesday March 24 2021 You've by now heard about the Ruger AR-556 "pistol," the weapon that was used to murder 10 people in Colorado two days ago. It's classified as a pistol because previous mass killings motivated the National Rifle Association to request minor changes to the weapon, which was originally classified as an assault rifle. Pistol or rifle, it shoots NATO 5.56-mm jacketed ammo, whose diameter is a little less than a quarter inch. This seemingly small bullet belies the huge cartridge and powder charge in the round, which can push the bullet up to about 2,800 feet per second. The energy delivered is sufficient to cut a person in half—there are no flesh wounds with these things, as you're lucky to come away as a paraplegic or quadraplegic. [It always bugs me when I watch a World War II movie in which a soldier gets hit with a machine gun or aircraft round, invariably clutching his chest or stomach while heroically uttering "They got me, Joe!" This is nonsense, and perhaps it's time to start airing autopsy photos of the children who were slaughtered by such weapons in places like Sandy Hook, Columbine, Parkland and Rancho Tehama.] The Ruger pistol (on the left) has roughly the same killing power as the Vietnam-era M16 assault rifle (on the right), including a 30-round magazine that also holds the 5.56-mm round. The major difference is that the M16 can be fired in either semi-automatic or fully-automatic mode, while the Ruger is semi-automatic only. Clever gun enthusiasts have found ways to illegally modify the trigger and housing to fire the weapon like a machine gun, although all fully-automatic weapons are banned in America (even in Red States). But search the Ruger website and you'll find that the AR-556 is listed as a pistol, thanks to the NRA. The NRA probably patted itself on the back getting it listed as such, but deep down you know they hated doing it. Conservatives hate change, which is why they will never allow a ban on assault rifles or any other deadly firearm that can be easily concealed, then whipped out to mow down dozens of victims. Republican lawmakers have even bragged that if President Biden proceeds with any related gun control measure, they'll see to it that the required 60% Senate majority is never achieved. Their tried-and-true argument is that some 50,000 Americans die in auto accidents every year, but no one calls for a ban on cars and trucks. It's the same with the COVID-19 vaccines—Republicans weren't getting vaccinated last year, so why change now? Add to that the fact that 47% of Republicans say they will not get vaccinated, thanks to Trump's persistent effect on their tiny, pathetic minds. Consequently, America will likely not achieve herd immunity, guaranteeing that the virus and it variants will go on killing many thousands more. Freedom! Liberty! Second Amendment! Huzzah!  "You Mean I've Been Eating Hamburger From 1960?!" — Posted Monday March 22 2021 My high school's cafeteria had an outdoor lunch service window that I often frequented, and I'd always buy their hamburger for 25 cents. It had a sauce that was heavy on mustard, but I loved it. I'd sit at one of the outdoor tables having lunch with Dan E. and John Z., talking about what we would do when we left high school. Dan planned on becoming an entomologist, but ended up with a PhD in Art History. Years later I'd often see John tooling around in his yellow VW Thing, a rather bizarre-looking auto that enjoyed a brief popularity in the late 1960s. I don't know what became of John, but I went on to study chemistry. I still remember the taste of those hamburgers, and I was reminded of those days while binge-watching 11.22.63, the 2016 eight-episode mini-series based on Stephen King's 2011 science fiction novel of the same name (which I've also read). The book and series tell the story pf a man (Jake Epping) who travels back in time to stop the assassination of President John F. Kennedy. Unsure of Lee Harvey Oswald's guilt, he first has to determine if Oswald had first tried to assassinate General Edwin Walker in April 1963. Walker was a real-life anti-communist zealot whom Oswald deemed a fascist threat (Oswald's involvement in the assassination attempt of Walker was later corroborated by Oswald's wife, Marina). Assured of Oswald's guilt, Epping then proceeds to track down Oswald and prevent JFK's assassination. I distinctly recall the early afternoon of Friday, November 11, 1963, when my high school French teacher (Mrs. Eleanor Farrell) was interrupted by a student from the hallway who handed her a note. In emotionless tones, Farrell recited "President Kennedy was assassinated at 1:00 pm today in Dallas, Texas. Vice President Johnson is now the President of the United States." She then returned to the blackboard without further comment, which I thought was odd at the time. Since then I've read about a dozen books on the assassination. None have revealed the true story, which will probably never be known. The best I've seen to date is Jeremy Bojczuk's 2014 book A Brief Guide to the JFK Assassination, but it too falls short of what probably really happened, or of those who were actually responsible. But "Since then, 'tis centuries" as Emily Dickenson once wrote (although only 57 years have passed since Kennedy's murder). Who knows what might be revealed in the coming decades (or centuries). The remains of Kennedy's brain (which record the true path of the backward- or forward-tracking bullet) are under lock and key by the Kennedy family, and may never be revealed for definitive forensic analysis. At any rate, 11.22.63 is a great series, and to me it's also tops as a time-travel adventure. You'll have to watch it to understand the hamburger connection.  Racism and Our Gang — Posted Thursday March 18 2021 In the early 1970s, Munira and I would would regularly go for lunch with our lab co-workers to El Tepeyac, a Mexican restaurant in East Los Angeles. The restaurant featured Manuel's Special, a pillow-sized burrito of rice, beans and beef that was on the house if you could eat the whole thing. Munira and I would invariably split one, joking about the lack of neighborhood stray dogs and cats and the possible nature of the restaurant's meat given its low prices. We'd also frequent another local restaurant called Sambo's, whose wall paintings depicted the eponymous little black child being chased by a tiger. Thank God the restaurant either went out of business or changed its name to something less offensive. I recalled this last memory while reading Our Gang - A Racial History of the Little Rascals by Julia Lee, a Chinese-American associate professor of English at Loyola University in Los Angeles. I have most of the Our Gang films, which were produced by Hal Roach Studios as silents (1922-1929) and early sound films (and later produced by MGM until 1944). I also have every extant Laurel and Hardy film that Roach produced from 1927 to 1940. In 1990 Munira and I attended a memorable night with Hal Roach at the Raymond Theatre here in Pasadena, where several Laurel and Hardy films were presented along with personal reminiscences of early Hollywood by Roach and Joe Cobb, a child actor and early member of Our Gang. Lee's book was a revelation, told from the perspective of American racist attitudes that existed in early Hollywood. But I was also struck by its purely historical information on Roach, his studio and the directors and child actors who starred in and produced the Our Gang films. Surprisingly, the inclusion of black child actors in the films was a natural outcrop of the relative innocence of the times, as the white and black members of Our Gang showed no innate racism in the episodes, although "Sunshine Sammy," "Farina" and'"Stymie" (my favorite) were often stereotypically shown as ignorant, spook-fearing, watermelon-loving pickaninnies. The fact that the book was written by a Chinese-American also resonated with me, especially in view of the recent horrific attacks on Asian Americans, spurred on by former President Trump's racist remarks regarding the "Chinese virus" and "Kung Flu." If you have the slightest interest in the racism of early Hollywood films and the sorry state of our country's politics today, please buy and read Prof. Lee's book. PS: In 1927, Hal Roach (1890-1990) put two of his film comedians together to form the team of Laurel & Hardy. They quickly became a favorite of young and old alike, and to this day are considered the best comedic film duo of all time. In 1983 I took my four-year-old son Kris to see a Laurel & Hardy retrospective viewing of five of their silent films, all of which had been remastered and restored. Kris enjoyed the movies, but I was dumbfounded by the superb quality of the films, which looked as if they had been shot yesterday. Since then, L&H films have been released in countless collections, but to this day they still await definitive video and audio restoration. The best I've seeen to date is the fantastic 10-volume set The Lost Films of Laurel and Hardy, of which all DVDs are sold separately (and expensively). The nearest thing in terms of quality is Laurel and Hardy - The Essential Collection, which I purchased and gave to several family members and friends, all of whom are devoted L&H fans.  The Economic Elephant in the Room — Posted Sumday March 14 2021 President Reagan proved that deficits don't matter. — Former Bush Vice President Dick Cheney Tax cuts always pay for themselves. — The Perpetual Delusionary Mantra of the Republican Party I watched Fareed Zakaria's GPS cable program this morning, in which economists Larry Summers and Paul Krugman talked about the pros, cons and likely consequences of President Biden's recently enacted$1.9-trillion American Recovery Act (ARA). A former president of Harvard University, Summers was a Treasury Secretary and economic advisor to presidents Clinton and Obama, while Krugman is a political writer, economic advisor and columnist who was awarded the 2008 Nobel Prize in Economics. Summers and Krugman are friends and colleagues, but they disagree on the costs, benefits and outcome of the ARA. In a nutshell, Summers feels that the ARA does not have sufficient long-term monetary resources to pay for itself, and he worries about its inflationary potential and the deficits that are likely to result. Krugman likened the ARA to a war-times act that—like the New Deal and the 2008 financial collapse—was necessary to pull the country out of the health and economic disasters caused by the COVID-19 pandemic that has so far killed over 530,000 Americans. Krugman also noted that while the ARA is costly, is is not likely to result in runaway inflation. I think Summers made a good point about the lack of any obvious financial resources to pay for the ARA (such as public investments like bonds), much less for Biden's plans for infrastructure improvement and climate change mitigation. Krugman's response was that similar cash outlays and fiscal borrowing occurred during the Korean and Vietnam wars, which led to manageable inflationary problems and deficits. During the discussion, neither economist brought up the topics of taxes, America's ongoing committment to its expansive foreign military presence or to the booming stock market, which has inexplicably soared throughout nearly all of the 2020-21 pandemic year. I can understand why most politicians today won't touch the issues of raising taxes or cutting back on America's military, but the trillions of dollars now being amassed by corporations and their stockholders represents a hugely significant source of funds needed to pay for public programs, infrastructure improvements and climate change mitigation. Roughly 55% of Americans are currently invested in the stock market one way or another (through actual stock ownership, pension plans or other indirect investments), and they are now seeing rates of return far in excess of what banks are paying on savings accounts. Furthermore, the tax rate on capital gains is still only 15%, far below what most middle-class American are paying on their combined federal and state income taxes. To me, this is the elephant in the room: if America wants a responsible pay-as-you go economy, reliable infrastructure and climate mitigation, it had better tap into the corporations and their stock holders, and this means raising taxes on those who are benefiting the most. The market is now poised for an even bigger boom as we get COVID-19 under control, and if we don't want dangerous bridges, unreliable public utilities and a ruined climate while giving a free pass to Bahamas-bound wealthy freeloaders, stock market-specific taxation is the way to go.

 Why Most Women Don't Marry Scientists — Posted Thursday March 11 2021 By the way, Gary Larson is back!

 Dark Matter Detection Fails Again — Posted Thursday March 11 2021 The great philosopher of science Karl Popper famously assigned a critical element to what he defined as "science", which is that it must be falsifiable. That is, every scientific theory must not only stand the test of ongoing experimental validation, but it must also be subject to being proved wrong. For example, while Einstein's general theory of relativity (gravitation) has perfectly passed every test thrown at it for over 100 years, a single confirmed observation that disagrees with the theory would disprove it, requiring that the theory be either modified or discarded in favor of something better. Consequently, there are no true laws of Nature, only theories awaiting revision or refutation. Popper's falsification idea has not always been popular, but it's a good start. Related to this is the notion of reproducibility, which involves applying the same or similar experimental techniques, methods and materials used to establish a theory in the first place. If you conduct a experiment (or series of identical experiments) that appears to uphold a theory you've proposed, but someone else cannot reproduce the same results, then your theory remains either a hypothesis or a conjecture (or it's simply pure bunk). A case in point is the set of experiments performed by a research team in Italy called DAMA/LIBRA, which uses a mass of thallium-doped sodium iodide to detect dark matter particles. But rather than detect these hypothetical particles themselves, its approach has been to look at whatever detection events occur over time, the idea being that as the Earth is swept along with the Milky Way's rotation, it must encounter a varying biannual number of particle events depending on whether Earth's orbit is moving with or against the galaxy's rotation. In a sense, the exact nature of the detection event doesn't matter, only the sinusoidal pattern of detected events matters. This approach would then rule out any human, systematic or random experimental errors and noise in the detection apparatus. The DAMA/LIBRA team has indeed reported such a semiannual pattern in its data, appearing to confirm the presence of something akin to dark matter. You might recall that the famous Michelson-Morley experiment of the late 1880s tried the exact same approach in an attempt to detect the luminiferous aether, a universal substance that was assumed to exist to provide a means for light waves to travel in space (the rationale was that since sound waves need air to move through and water waves need water, then light must also have something to "wave" against in order to propagate in space). The experiment famously failed, demonstrating that light can indeed move through the vacuum of space. However, the DAMA/LIBRA team did detect something, and until now it provided at least indirect evidence for dark matter. But more recently a series of identical experiments conducted by the ANAIS dark matter team at Spain's Saragossa University have consistently failed to reproduce the DAMA/LIBRA results to 99% confidence. The disagreement is detailed in today's Medium article by astrophysicist Ethan Siegel. While any limited series of disagreeing experiments is not sufficient to conclusively disprove the existence of dark matter, I'm still hoping that a satisfactory answer for dark matter's presumed effects on galaxies and galactic clusters will be explained by modified Einsteinian gravity. (Only time will tell, but at 72 my remaining years are dwindling away, and I'm getting impatient.)

 The Very Definition of Spin — Posted Thursday March 11 2021 And I'm not referring to quantum-mechanical spin. The phrase "It's not a flaw, it's a feature" once applied to bug-ridden computer programs, but the Republican Party has turned it into a political term, what we currently know as spin. Mississippi Republican Senator Roger Wicker, who joined every single one of his fellow Republican senators and congressional representatives in vehemently opposing President Biden's $1.9 trillion COVID-19 relief legislation, is now trying to take credit for the benefits the legislation will provide to his constituents and Mississippi businesses. In defense of Wicker's comments, prominent GOP members are using Wicker's words as proof of Republican bipartisan support for Biden's efforts, which they have uniformly opposed ever since Biden took office. I only wish that Sen. Wicker, an avowed devout Christian, would more carefully read the Gospel of Matthew, in which Jesus admonishes hypocrites and hypocrisy no fewer than 15 times. Since when did hypocritical spin become a treasured feature of Republican politics?  Coordinated Guessing — Posted Tuesday March 9 2021 The following is intended mainly for budding structural design engineers and nerds, but it has wide application to Newtonian and relativistic gravitational physics, electronic circuit design, fluid flow and similar computationally intense problems. Let's say you want to build a 100-story office building. You start by designing the basic structure from scratch, using a 3-dimensional grid of steel beams, girders and columns. You also know the various loads that the structure will have to safely support, including gravity, wind, snow, earthquake and occupancy loads. The basic structure will consist of thousands of nodes (where the beams come together) and links (the horizontal and vertical beams that connect the nodes). Your design will have to take all these things into account, including a safety factor. Where do you begin? In olden days you'd rely on rules of thumb, experience and slide rules. Nowadays the computer does most of the work, checking that your design is not only safe but can be built at the lowest possible material and labor cost. Given a few input parameters, the computer may also do the basic design as well. Trust me that your 100-story office building will involve thousands of nodes, and these are the basic elements that the computer uses to check for allowable beam stress, strain and deflection. Also trust me that for a structure involving $$N$$ nodes, the computer will need to construct an $$N \times N$$ matrix (almost always symmetric), and that it will have to solve a system of $$N$$ simultaneous linear equations of the form $$A X = Y$$, where $$A$$ is the matrix, $$X$$ is the $$N-$$dimensional vector of unknowns (say, beam stresses) and $$Y$$ is the vector expressing all the known constraints on the structure. The computer must somehow solve the system via $$X = A^{-1}\,Y$$, where $$A^{-1}$$ is the the inverse of the matrix $$A$$. Lastly, trust me that calculating inverse matrices is computationally a total bitch. For a system of thousands of nodes, no computer can do it directly, and a time-consuming process known as iteration must be used, where each iteration essentially involves an increasingly more accurate guess of the unknowns. Designing a safe and cost effective office building is thus very complicated, but the number of elements is still finite. What if you need to design a continuous structure, say an aircraft wing? Such a structure is not described by a finite number of elements like beams and girders, but the wing's stresses, strains and deflections must be calculated using a seemingly infinite number of design elements. What do you do now? Of course, you discretize the structure using a finite grid of nodes and links, an approach known as finite-element design. The computations become more accurate the more nodes and links you use, but the calculation is essentially the same as the office building example. The importance of solving large-scale linear (or linearized) simultaneous equations cannot be overemphasized, and as noted earlier the problem spans many technological applications now essential to modern life. It is therefore not surprising that an enormous amount of effort has been expended on finding efficient computational solution methods. The number of computer interations or steps required to achieve a solution is then key, since it largely defines the effort required to solve the problem. For some problems, that number can be enormous, which, due to cumulative floating-point errors and time constraints, may result in erroneous solutions. The latest Quanta magazine spells out the problem in more detail, and it also describes a new technique called "coordinated randomness" that has proved (at least marginally) useful. While solution guesses are helpful, it's often difficult to know just how to arrive at them. The Quanta article describes such an approach based on random guesses, and it implies that in some cases even random guessing can be useful (unlike the SAT and GRE exams you took). The article interested me for a number of reasons, as I used to do large-scale numerical analysis of both linear and nonlinear systems and because I still think there might be some validity to the simulation hypothesis, which is the idea that something or someone (God, a post-human computer programmer or even intelligent Nature itself) is simulating our universe using an unimaginably complex computer program. Our entire observable universe is composed of roughly $$10^{90}$$ particles and fields, which is mind-bogglingly huge but still finite, and therefore subject to computer simulation. Sorry for this overly long and nerdy post, but it underlies a fascinating and important mathematical problem.  Stanley Tucci — Posted Sunday March 7 2021 I first became aware of American actor Stanley Tucci in the excellent 1993 action thriller The Pelican Brief starring Julia Roberts, Denzel Washington and Sam Shepard (didja know that Shepard was also a 1961 graduate of Duarte High School, my alma mater?) In the film Tucci plays a cold-blooded assassin, a far cry from his comedic turn in the hilarious 1998 film The Impostors with Oliver Platt, which regularly had my wife, me and our kids literally in stitches. Don't miss the annoying German ship steward's immortal line "It has made me also $$\ldots$$ moist" or Billy Connolly's "Powerful enough to snap the neck of a small beast, and yet sensitive enough to caress the tender throat of a young castrato — coax a song out of him!" Now Tucci is starring in the popular CNN reality show Searching for Italy, in which Tucci travels to various Italian cities visiting that country's historical treasures and sites, all while stuffing his face on the local cuisine. My family members love it, but I see it as just another "food porn" show, and I can't get into it. I did like the PBS series Rick Steves' Europe, which is far more educational and entertaining (but still has Steves stuffing his face much of the time). Perhaps my dislike of food shows stems from the food I'm eating now as an aging widower: basic stuff like fruit, vegetables, bread and the wonderful "Beyond Meat" plant products that have made me almost a vegetarian. Like the bumper stickers say, "Eat Right, Exercise, Die Anyway."  Dirac on the Constancy of the Gravitational Constant — Posted Saturday March 6 2021 Although I dearly love the work of Isaac Newton, Albert Einstein and Hermann Weyl, my favorite physicist just has to be "Father of Moden Physics" Paul Adrien Maurice Dirac (1902-1984), whose foundational contributions to physics spanned everything from quantum mechanics to general relativity. In a far saner and less ignorant world, Dirac's name would be as recognized as those of Newton and Einstein. In the early 1930s Dirac began to question the nature of large dimensionless numbers, such as the ratio of the electric force to the gravitational force (roughly $$10^{39}$$) and the relatively small value of the fine structure constant $$\alpha$$, which is about 1/137. He went so far as to wonder if these figures were true constants of Nature, or if they might vary over geological or cosmological spans of time. For example, the Newtonian gravitational constant $$G$$ is about $$6.67 \times 10^{-11}$$ in the kg-m-s unit system, but humans have only known about it for some 400 years. It's entirely possible that it might be slowly but measurably changing over periods of thousands or millions of years. We just don't know. This situation reminds me of the story of the ephemeral fly, which I recounted long ago on this site. It's a small insect that lives for only a few hours after its hatching, and as it flits around desperately seeking a suitable mate during its brief life span it might consider the trees and flowers of its world as everlasting and permanent. We humans live far longer, but we might also find ourselves fooled into thinking that the things we observe and measure are similarly truly constant. On the basis of what we know about modern cosmology today, the universe is doomed to perpetual and accelerating expansion, with all matter eventually being transformed into low-energy radiation, a view that is predicated upon the constancy of dark energy. But if the density of dark energy is not constant but decreasing, then the universe might halt its expansion and begin contracting, perhaps transforming itself again into a primordial mass-point and reinstigating a new Big Bang. Here is Dirac in 1979, talking about the constancy of $$G$$. He died in 1984, sadly having never learned about recent discoveries of the accelerating expansion of the universe: PS: Dirac's eccentricities are nearly as famous as his physics. Forced to speak only French in his home while growing up, he became extremely taciturn in his adult life (his students coined the term Dirac unit, meaning one word per hour). He was notoriously aloof but not unfriendly, preferring long stretches of solitude and daily walks to social interaction. At a party on board an ocean liner with fellow Nobel Laureate Wolfgang Pauli, he was asked to dance. "Come on, there are lots of nice women here, Dirac!" said Pauli, to which Dirac responded "How do you know they're nice?" While discovering quantum field theory, antimatter, the Dirac relativistic electron equation (the greatest equation of all time, in my opinion), the Dirac delta function and many other fundamental discoveries, Dirac managed to marry and have two daughters with the sister of fellow Nobel Laureate Eugene Wigner (Dirac's friends and colleagues were stunned that Dirac had not only a romantic side to his personality but a sex drive as well). He invariably introduced his wife Margit to others as "Wigner's sister." Weary of the cold weather in England, Dirac took an emeritus position at Florida State University in 1972. I equate this event as akin to Einstein arriving at a community college and asking for a teaching job. These and many other stories are recounted in Graham Farmelo's great 2011 Dirac biography The Strangest Man: The Hidden life of Paul Dirac.  Physics Leads the Way — Posted Wednesday March 3 2021 Good news: the American Physical Society will not hold any future physics meetings or conferences in American cities that tolerate social injustice. I believe this will apply to many Red State cities, whose ignorant denizens don't believe in science anyway.  Geek Tuesday — Posted Tuesday March 2 2021 I occasionally get emails asking what programs I use to write and post mathematical text. For online math, I use MathJax, which is free and requires only a basic familiarity with the LaTeX typesetting system. For documents, over the years I've used numerous computer programs, going all the way back to PCTeX, Scientific Workplace, MathType, LyX and most recently TexStudio, the latter two of which are free. In 1986 I induced my office to spend$300 for Lotus Manuscript, which had rudimentary math tyepsetting ability. It was okay as a word processor, but took hours to render readable math. Today there are more free and not-free math programs than I can name. I still use the amazingly powerful Mathematica on occasion (I still have the 1992 DOS version), but only to do calculations I'm either too lazy or too stupid to do myself. Retired Stanford University math professor Donald Knuth is considered the father of modern mathematical typesetting, whose many books include The TeXBook, from which I learned the TeX programming language many years ago. Written in a highly amusing style, the book's illustrations by Duane Libby are both clever and hilarious: Dirty Tricks!

 A New Media Technology — Posted Monday March 1 2021 Older folks like me will recall the "colorization craze" that took place in the 1980s, which attempted to make old movies look more realistic (or at least more interesting). It failed (the phrase "putting lipstick on a pig" comes to mind), mainly because it predated the ensuing "remastering" technology that removed scratches and other defects in the original films. Even later (in the 2000s), remastering techniques had progressed to the point where frame-by-frame toning consistency, interpolation, frame speed correction and similar repair techniques made the films look almost new. Perhaps the best example of this is the remarkable 2018 film They Shall Not Grow Old, which stunningly presents a series of World War I films that appear to have been shot yesterday. As amazing as this technology is, it's still far from perfect. Depending on the condition of the original material, facial features like hair, teeth and skin complexion cannot be rendered accurately. This is quite apparent in the above-mentioned film when the subjects smile, revealing dental features that look pretty awful (although the subject's teeth were often bad in real life). There's an interesting recent video on YouTube describing a new technology for not only repairing and remastering old photos and films but enhancing them to near-lifelike quality using neural network learning techniques. While it relies in part on the use of existing models and morphing, the results are nothing short of amazing: The video cites a paper that describes the technology in more detail, although I had some trouble understanding it (I have a friend with a Caltech PhD in computer recognition who might want to explain it to me). As a fan of old silent and classic films, I'd love to see the day when they can be rendered using this or an even better technology. However, at the same time I fear its misuse in Deepfake applications that can generate phony photos and videos that are indistinguishable from real life. I can easily imagine Fox News airing a Deepfake video showing a progressive political candidate having sex with a young child, which would quickly go viral among Republicans. Even if such videos were quickly reported as fakes, the images would persist in the minds of gullible conservative voters, destroying the candidate. Only time will tell where things will go from here. I'm hopeful (imagine watching crystal-clear Laurel & Hardy films), but I'm still realistic when it comes to the current state of the world. PS: Some years ago I regularly exchanged emails with Dr. John Sotos, M.D., whose book The Physical Lincoln, which examined Abraham Lincoln the way a physician would, revealed physical and medical aspects of our 16th president in fascinating detail (for example, a country dentist, while pulling an infected molar from Lincoln, inadvertantly took out a piece of his lower jaw bone as well). Based on his examinations of Lincoln's features, behavior and medical history, Sotos believes that Lincoln suffered from a genetic malady that would have imminently killed him even if Booth's bullet had missed. I highly recommend the book. My note on a recent YouTube post:

 The Misinformation Pandemic — Posted Sunday February 28 2021 I caught CNN's Fareed Zakaria on his popular GPS show this morning, and as usual he addressed a number of important issues of the day. He had multi-billionaire Bill Gates on hand to talk about climate change (again), and although the Bill and Melinda Gates Foundation is doing some worthy things to benefit the poor and disadvantaged in Third World countries, I strongly suspect that as a highly intelligent and educated man he knows full well that the human race is probably permanently screwed. One of the reasons I feel this is the case is that Gates also talked about the country's (and world's) misinformation problem, which is largely responsible for our unwillingness to seriously address many existential problems, of which climate change is just one. Prior to the Gates segment, Zakaria talked about the incredibly brutal 2018 assassination of CNN journalist Jamal Khashoggi by Saudi agents acting under the direction of Saudi Arabia's Crown Prince Mohammed bin Salman. In particular, Zakaria addressed then-presidential candidate Joe Biden's promise to hold bin Salman responsible for Khashoggi's horrific murder and dismemberment, which now-President Biden hypocritally walked back due to supposed Real Politik realities. As Zakaria notes, Biden has decided not to punish bin Salman because ever-expanding American empire-building ambitions need to preserve the good graces of Saudi Arabia for both economic and military purposes. Biden's decision to let bin Salman walk and Biden's recent decision to hit Iranian-supported facilities in Syria are just two reminders to me that while Biden may be a far better presidential choice than Donald Trump, America's global military ambitions far outweigh any morally admirable intentions that the U.S. tries to promote around the world. And on that note I'll point out that the real purpose of misinformation is to promote evil while hypocritally posing it as good. When Khashoggi was murdered, dismembered and the pieces carried out of his hotel in suitcases by his Saudi killers, the world was shocked that then-President Trump chose to believe in bin Salman's innocence. But the Republican Party expressed little shock, since its members viewed journalist Khashoggi as just another dirty brown Arab. Misinformation feeds on a combination of fear, ignorance and arrogance—traits that perfectly define the Republican Party—and it is anyone's guess if President Biden will be able to escape its lure or consequences. Geek Extra: In a straw poll taken today, former president Donald Trump got the support of 68% of CPAC attendees, or one standard  deviant  deviation.

 What the Hell is Quantum Holonomy Theory? — Posted Sunday February 28 2021 Technophile Arvin Ash has an interesting series of science videos on his YouTube website, with an emphasis on modern physics. Of particular interest to me is that Ash has addressed the dark matter and dark energy problems numerous times, always citing current research and progress in these areas. His latest video addresses something called quantum holonomy theory, a subject I admittedly never heard of before. But it sounds interesting—Ash notes that it's a theory of quantum gravity that's focused on the fundamental simplicity of Nature, an asset sadly missing from superstring theory, loop quantum gravity, supersymmetry and even the Standard Model of physics itself. Its sole distraction, at least from what I've managed to glean from the lengthy 2015 paper Ash cites in his video, is that it involves non-commutative geometry. While non-commutative algebra presents no problems in other areas of physics (rotations, matrix multiplication, differential operators, elementary quantum mechanics, etc.), its application to pure geometry is highly non-intuitive (at least for me). Still, quantum holonomy assumes that we live in just the three space dimensions we've come to know and love, and it focuses on the properties that physical objects exhibit when they're moved from one point to another. Conceptually this is very appealing, as you can't get much simpler than that. The video is about 16 minutes long, including the usual plug for Magellan TV (which you can skip over):

 Shame on America's Conservative Republican Christians — Posted Saturday February 27 2021 The GOP's Conservative Political Action Conference is being held in Orlando, Florida this weekend. It will prominently feature a full-size golden idol of former President Donald Trump, seemingly in violation of the Second Commandment, which states that "You shall not make nor bow down to any graven image or idol." The Republican Party is no longer a political party, but a Trump cult.

 Nerd Saturday — Posted Saturday February 27 2021 First, some history. Nearly the same time that Einstein published his theory of general relativity in November 1915, the famous German mathematician David Hilbert found a simple way to express the same gravitational physics by extremalizing the action quantity $$S = \int \!\! \sqrt{-g}\, R\, d^4x \tag{1}$$ where $$g$$ is the determinant of the metric tensor $$g_{\mu\nu}$$ and $$R$$ is the Ricci scalar. If we vary the metric tensor of this action, we arrive at the Einstein gravitational field equations for free space, $$R^{\mu\nu} - \frac{1}{2}\, g^{\mu\nu} R = 0$$ where $$R^{\mu\nu}$$ is the Ricci tensor (any one bothering to read this will know what I'm talking about). Einstein also realized that the free-space equations could be extended to acount for the presence of matter by setting the equations equal to a quantity known as the energy-momentum or stress-energy tensor $$T^{\mu\nu}$$, or $$R^{\mu\nu} - \frac{1}{2}\, g^{\mu\nu} R = \frac{8 \pi G}{c^4}\, T^{\mu\nu}$$ where $$G$$ is Newton's gravitational constant (the proportionality constant is chosen so that the field equations are consistent with the classical Newtonian gravitational result; it is also dimensionally consistent with that of the action). Einstein's solution was complicated and drawn out, but his field equations matched those of Hilbert's vastly simpler approach, which must have really pissed off Einstein. Although Einstein got credit for the discovery, the action $$S$$ is now referred to as the Einstein-Hilbert action. In 1918, the noted German mathematical physicist Hermann Weyl proposed that a better action was the quadratic quantity $$S = \int \!\! \sqrt{-g}\, R^2\, d^4x \tag{1}$$ whose equations of motion are $$R \left( R^{\mu\nu} - \frac{1}{4}\, g^{\mu\nu} R \right) + \nabla^\mu \nabla^\nu R - g^{\mu\nu} g^{\alpha\beta} \nabla_\alpha \nabla_\beta R = k T^{\mu\nu}$$ where $$\nabla$$ is the covariant derivative and $$k$$ is some constant. Although the action in (1) is equivalent to that of Hilbert's (subject to a simple constraint on $$R$$), the action is of dimension zero, complicating the inclusion of the energy-momentum tensor (which is of dimension inverse length squared, so that $$k$$ must be dimensionless). As it is then, we have no way of connecting Weyl's action with the energy-momentum tensor. A few solutions have been proposed, including the division or multiplication of $$R^2$$ by an appropriate scalar quantity, like the energy-momentum scalar $$T$$ or some scalar quantity $$\phi(x)$$ that fixes the dimensionality problem. Such fixes are called $$f(R, T, \phi))$$ theories, all of which have been examined extensively by researchers with little or no progress. Further complicating the situation is the fact the the Bianchi identities $$\nabla_\nu \left( R^{\mu\nu} - \frac{1}{2}\, g^{\mu\nu} R \right) = 0$$ are inviolate and cannot be avoided, and so must somehow play a role in whatever equations of motion result from the choice of $$f(R, T, \phi)$$. As readers of this site will know, I've long been fascinated by modifications of Einstein's gravity theory that might explain the problems of dark energy and dark matter, and I hope that the answer will be found someday.

 Them Thar Soshalists Had Best Listen Up — Posted Saturday February 27 2021 Here's another timely comic by Ruben Bolling, drawn again in the style of famed Disney cartoonist Carl Barks. I see Bolling's Hollingworth Hound as the modern counterpart of one of the Beagle Boys (The Beagle Boys! The Dreaded Beagle Boys!) And it's true—Texas' power grid is completely free-market, with prices driven solely by supply and customer demand. When the Big Freeze hit Texas last week, customers saw their electricity bills going into the thousands of dollars for only a few days' worth of demand. And gosh-durn it all, they're just gonna have to pay up one way or another, despite calls for energy regulation by them-there danged progressive types.

 Still Coping — Posted Thursday February 25 2021 As a food bank volunteer, I deliver food to the homebound in Pasadena, Arcadia, Monrovia and Duarte, and my route takes me right past my wife's grave. I can see our joint headstone as I drive by, and I always whisper Sabahelkhayr, ya hayati, ana behebik! (Good morning, my dear, I love you!) With 19 months now gone since her passing, my eyes still invariably fill with tears. Although I'm tapering off my antidepressant medication and my grief therapy sessions, I'm now convinced that I will never recover from the loss of my wife. Other than my family members, my only consolation is that with global climate disruption, ongoing COVID-19 isolation, the virus variants and the insane anti-truth, anti-science authoritarian crap still running rampant in this country, she's not here to suffer through it. That's a hell of a consolation.

 Life on Mars? — Posted Thursday February 18 2021 NASA's Perseverance probe has landed successfully on the surface of Mars!! Part of its mission is to detect evidence of life, and I can only wonder what sociological and religious impact it will have on the human race if it finds it.

 And It's Gonna Be A Long, Long Time — Posted Thursday February 18 2021 I've been going to the gym for forty years, but in February 2020 my gym closed down due to COVID-19. It then underwent bankruptcy and restructuring and only recently reopened in Arcadia. I've hardly exercised since my wife passed away in July 2019, but I tried it again this Tuesday, barely lasting 15 minutes. I went again this morning and lasted 22 minutes, so I guess I'm on my way. But it's a far cry from the 90 minutes I used to work out. I could only lift about half the weight I used to, and the number of reps I can do is very limited. My body was saying "Hey, I remember this, but I just can't do it any more!" so out of respect for my now-frail 72-year-old frame I'm not gonna push it. I hope your day is going better than mine.

 Laying the Blame Where It Belongs — Posted Thursday February 18 2021 Schadenfreude is a German word that means taking joy or pleasure in the misfortune of others. I would be taking Schadenfreude over the self-inflicted misery that Texas is experiencing right now over the millions of people going without power and water during a record-setting cold snap, but I know that millions of children and progressive adults are also suffering. Texas Governor Greg Abbott and Senator Ted Cruz are blaming renewable-energy utilities for the problem, despite the fact that less than 10% of Texas' power is generated by wind turbines and solar cells. Texas experienced a similar event in 2011, but conservative hatred of regulation and "green" energy blocked progressive efforts to winterize the state's power infrastructure. The blame is laid bare in today's New York Times article. Before flying off to Cancun to escape the cold while his constituents suffered, Sen. Cruz went so far as to point the finger at California, which he described as a dystopia with constant power blackouts and water shortages due to overregulation. You may recall that under the Obama administration Texas expressed a strong desire to secede from the Union. With the persistent and apparently entrenched animosity of Texas and other Red States against President Biden and the progressive Democratic agenda, I think secession of these states might be a very good idea indeed. I suggest they move to Antarctica. PS: Speaking of Schadenfreude, is it okay to start celebrating Rush Limbaugh's death? I'm not celebrating, but in truth I couldn't care less. However, No man is an island entire of itself; every man is a piece of the continent, a part of the main; if a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as any manner of thy friends or of thine own were; any man's death diminishes me, because I am involved in mankind. And therefore never send to know for whom the bell tolls; it tolls for thee. — John Donne But still,

 Hegemony, the Great Storm and Boltzmann Brains — Posted Monday February 15 2021 Sorry for abridging Bolling's latest comic, I just didn't find all of it that funny:

 On American Christianity in the Age of Trump — Posted Monday February 15 2021 As a Christian, I've often wondered how Donald Trump took hold of (and still holds) his American Christian evangelical base with a vise-like grip, despite the obvious anti-Christian views that he has demonstrably espoused throughout his life. Here is an article written by Isaac Bailey of Davidson College who poses the same question that I have. My response is "They're not true Christians," but it still raises the question of how so many supposed Christians could be so misled.

 Hossenfelder on the Simulation Hypothesis — Posted Saturday February 13 2021 Many practicing hydraulic engineers deal solely with one-dimensional flow regimes (especially those involving open-channel flow), while researchers will get involved in more complicated two- and three-dimensional situations, where the Navier-Stokes equations are utilized. These are highly non-linear equations whose full solutions still elude even computerized analysis. Did you ever wonder how the turbulent flow of a waterfall might be completely described by a Navier-Stokes analysis? Yet Nature does it instantaneously and seemingly without effort. This had led me to wonder exactly how Nature pulls off such things, and if there's some complicated calculation being conducted somewhere behind the scenes. I've even thought that maybe this is why time itself exists, which might be necessary for Nature to do her stuff. The idea that there's some calculation going on in Nature is not a new one, and it's just one simple example of why Bostrom's simulation hypothesis is embraced by many scientists. Yet, as the noted German physicist Sabine Hossenfelder points out in her latest video, there is zero empirical evidence for the simulation hypothesis, so it must be relegated to the realm of religious faith, not science. I responded to Hossenfelder's post, where I noted that if the notions of a creator God or the simulation hypothesis are wrong, then there is really only one remaining explanation for the profound and consistent physical laws of Nature we observe in our world: that we live one of a possible multiverse of worlds (or that we live in one of a many-worlds universe). As a Christian I believe the answer is God (which if you think about it is pretty much the same as an omniscient simulator), but if I'm wrong then I prefer the many-worlds interpretation, which does not violate the laws of quantum mechanics. Whichever is true belies the inescapable fact that there is a curtain of ignorance that separates us from the actual reality of our universe. It is my fervent hope that when we die we'll find out just what the heck it is. Here is Hossenfelder's video, which runs about 10 minutes: PS: The Navier-Stokes problem is one of seven mathematical problems featured in the Clay Mathematical Institute's Millennium Prize offering. The prize is \$1 million dollars, not an inconsiderate sum for what amounts to an idle pastime for a true geek.

 Declare War, President Biden — Posted Friday February 12 2021 Today's news includes reports that President Biden is "anxiously awaiting" the Senate conviction vote against Donald Trump, but I'm sure he has no doubt what the result will be—acquittal, which Trump will view as "exoneration." My own guess is that no more than six or seven Republican senators will vote to convict, leaving Trump in the clear to run for election again or incite another insurrection. If I were Biden and all the other Democrats, I'd see the Senate's acquittal as proof positive that the GOP has no intention of working with the Biden administration, just as it had no intention of working with President Obama's. Biden should therefore announce that he has no faith in the GOP in anything, and proceed to issue as many executive orders as he can get away with. Biden should also make public Trump's taxes and all the information he has on Trump's four-year occupation of the White House, including every scrap of data he has on Trump's dealings with Russia, Stormy Daniels and every other trollop that Trump has bedded since election.

 Fifty Years Ago — Posted Tuesday February 9 2021 Fifty years ago exactly (it was also a Tuesday), I woke up on the floor of my studio apartment in Long Beach sometime just after 6 am. The place was rocking violently, and I realized it was an earthquake. I was in my pajamas, and I rushed out through the door onto the second floor balcony. Right away I noticed two things: the water in the swimming pool below was sloshing crazily back and forth, and two attractive girls in the apartment next to mine had come out wearing only their panties and bras. My first thought was: Why hadn't I noticed these girls before? And my second thought was: Yeah, this just had to happen on the second day of my last semester at California State College at Long Beach! I later learned that the earthquake's epicenter was forty miles away in Sylmar, with a Richter magnitude of only 6.5, and I was surprised that it was felt so strong in Long Beach. But there was very lttle damage where I was, although the aftershocks kept me awake for several days after. We had several other moderate earthquakes years later, but on January 17, 1994 (my older son's 15th birthday and on the MLK holiday), we experienced the 6.7-magnitude Northridge earthquake, which shook our Pasadena house with a violence hard to describe. My wife and I checked on our sons, and we called on other family members, but thank God everyone was alright. Our house underwent moderate damage, but those of my co-workers were far worse. The next few days at work were interesting. The afterquakes shook my 14th-floor workplace pretty good, and one unnerved long-term employee took early retirement as a result. We're long overdue for another major earthquake in Southern California, if not the "Big One," the predicted 7.6-Richter San Andreas event that's sure to come someday. God save us all.

 Why History Repeats Itself — Posted Friday February 5 2021 BTW, Entschuldigen Sie means "Excuse me," and meine Dame would be much more polite than Fräulein. Otherwise, Ruben Bolling's got the Hitler-Trump analogy spot on. PS: It's obvious that some of Bolling's characterizations intentionally mimic the work of other comic artists (notably Disney's Carl Barks). In the above comic, Billy Dare is very similar to the character Tintin, an adventurous European youth created in the 1930s by the Belgian artist Georges Remi. I discovered Tintin many years ago, and my Egyptian wife Munira was also very fond of the comic strip and the many books that Remi published. Our sons grew up with Tintin books, although their school friends had no idea the character existed. In 2011, directors Steven Spielberg and Peter Jackson released the computer-animated film The Adventures of Tintin, which I highly recommend.

 On the Fine Tuning Conundrum — Posted Thursday February 4 2021 I remember in early college wondering why the speed of light $$c$$ in vacuum is some 2.99792458$$\times 10^8$$ meters per second. I thought that maybe there was some deep law of fundamental physics that would provide the answer, perhaps as some complicated combination of $$\pi, e , \epsilon$$ and other fundamental numbers that would give the speed of light. That's probably wrong—the speed of light $$c$$ is likely just a pure constant of Nature. Much more recently, I discovered that the cosmological constant $$\Lambda$$, which appears in the full expression of Einstein's gravitational field equations $$R_{\mu\nu} - \frac{1}{2}\, g_{\mu\nu} R + \Lambda g_{\mu\nu} = \frac{8 \pi G}{c^4}\, T_{\mu\nu}$$ is not only a small positive number, but that if it differed by more than one part in $$10^{123}$$ then our universe would never have been possible. But it too is probably just a constant of Nature. I'm quickly becoming addicted to neuroscientist Robert Lawrence Kuhn's long-running series of PBS and YouTube videos entitled Closer to Truth, whose 30-minute episodes delve into the basic question of why we (or anything) exists. Most of the episodes feature a blend of physics, religion, biology and the science of the human mind, but those dealing with what is known as fine tuning are particularly fascinating. Fine tuning refers to the fact that the observed magnitudes of various physical constants (electric charge, the strength of gravity, the fine structure constant, etc.) are so tightly constrained that if they were even slightly different, life (and possibly even the universe itself) could not exist. Kuhn's most recent venture into the topic is perhaps his best to date, as he interviews the physicists Martin Rees, Leonard Susskind, Russell Stannard, Alex Valenkin and Roger Penrose regarding their views on the subject. Kuhn comes away with four basic answers to fine tuning: sheer accident; fundamental but as-yet unknown physics; God; and the multiverse. Susskind also addresses the cosmological constant, and while he is an atheist he admits that the observed tiny value of $$\Lambda$$ is balanced on a knive edge of unexplainable, mind-boggling precision. At the end of the video Kuhn notes that most physicists today believe that we live in a multiverse (or a "megaverse," as Susskind calls it) of possible universes. If that number is infinite (or finite but preposterously large), then at least a few would be nearly identical to our own, and we just happen to be in one of them. The video is about 26 minutes, and well worth watching:

 A Physicist Speaks Out on the Social Over-Dominance of the Internet — Posted Thursday February 4 2021 New York Times writer Charlie Warzel interviewed retired physicist Michael Goldhaber, a noted scientist who predicted many of the social problems we're currently dealing with, including the rise of inane reality television, website attention-seeking, political shamelessness, rampant celebrity-worship and the influence of terrorists on social media. Goldhaber is just one in a family of distinguished physicists who worked with many notable quantum physicists from the 1940s on. Goldhaber's interest in politics and social issues goes back to his childhood. With the rise of the Internet in the 1990s he predicted what might collectively be called the "attention economy," which spans not only the Internet and information technology but trends in the entertainment industry as well. I encourage you to read the article, along with an earlier interview with Goldhaber posted by the American Institute of Physics in 1995. I cannot help but see myself in some of the issues raised by Goldhaber in the interview, and it seems that my interest in posting articles on my own website may be nothing more than an attempt to grab attention and vent my feelings and opinions. But I also see my what I'm doing as a kind of online diary that my children, grandchildren and future progeny can look at long after I'm gone. Hopefully, I will be a positive influence on them in a scary future world that will need all the optimism it can muster.

 How Times Have Changed — Posted Tuesday February 2 2021 I received my first Moderna vaccination today, and with the exception of a slightly sore left arm I feel fine. While growing up in Duarte, California in the 1950s, I would eagerly await the ice cream truck coming down Bloomdale Street. When I heard the truck's jingle (which I still remember) I would beg my mother for a dime, which at the time would buy what was called a "Sidewalk Sundae" ice cream bar. Fortunately, outside of the ice cream truck and the occasional visit of Little Oscar's Wienermobile, I never saw this guy: Those of you my age will remember getting polio booster shots in grade school. We'd have to bring a permission slip from our parents (with a dollar bill attached), then line up for the dreaded shot at the nurse's office. Bruce, John, Greg and I would try to look brave to impress the girls, but inside we were scared to death of those needles. PS: One day the Wienermobile stopped in front of our house, and my mother and I went inside. I was only about four years old, but I towered over Little Oscar (a middle-aged "little person") whose face and wrinkles made him look strangely old to me. I was glad to get out of there, although I came away with a "Weenie Whistle."

 Will They Ever Change? — Posted Monday February 1 2021 Shortly after the stoning of the first Christian martyr Stephen (which the future apostle Paul personally witnessed and approved of), Paul set out with his assistants to the city of Damascus, where he intended to arrest evangelical Christians and bring them back to Jerusalem to be tried for apostasy. Along the way, he encountered Jesus Christ, and was both blinded and enlightened. Paul's Road to Damascus experience is one that many Christians experience (I sure did), and in Paul's case it represented a complete reversal of his religious philosophy. He was totally and forever changed, yet he would always refer to himself as the "chief sinner" for his persecution of the early Christian church, which he always regretted. Today we have millions of supposedly devout Christians who view former president Donald Trump as the new Messiah. They believe that he lost the 2020 election due to criminal conspiracy and fraud, that Democrats drink the blood of slaughtered babies to obtain a precious substance called adenochrome, and that the government of the United States must be violently overthrown in order to restore a proven sociopath and sexual deviant (Trump) to power. Will they ever experience their own Road to Damascus moment? I highly doubt it.

 For Geeks Only: Chameleon Gravity — Posted Monday February 1 2021 Have you ever heard of something called chameleon gravity? I just caught wind of it, but scientific and popular articles have been around on the topic for some time now. It's supposed to explain how galaxies form, as well as providing a window into dark matter and dark energy. It turns out to be yet another $$f(R)$$ gravity theory, but in this case $$f(R)$$ is a kind of substitute for the cosmological constant $$\Lambda$$. It also involves a scalar field $$\phi(x)$$, which means it has to have a mass and a kinetic term in the Lagrangian. It's guaranteed to provide additional terms in the equations of motion, which is pretty much what $$f(R)$$ theories are designed to do. In July 2019, an article in Nature came out that caught the attention of the popular press, and for a while there was a flurry of Internet articles reporting what might be a major new discovery in cosmology. It all reminded me of how the press made a big fuss over a supposed great discovery that Einstein made in 1928. As Abraham Pais described it in his book Subtle is the Lord: The Science and Life of Albert Einstein, it was much ado about nothing. Still, chameleon gravity is an attempt to dispense with the notion of dark matter by way of modifying Einstein's 1915 gravity theory, an attempt that I welcome since I believe dark matter does not exist. By the way, if the Ricci scalar $$R$$ is a pure constant in cosmological theory (and it almost certainly is), then it is easily shown that our universe will inexorably expand forever. And if the cosmological constant $$\Lambda$$ is a true constant, then the rate of the expansion will increase without bound with time.

 Q-Nuts, Featuring Good Ol' Charlie Brown — Posted Friday January 29 2021 I never realized Linus was insane.

 We Cahn't See! — Posted Friday January 29 2021 I was supposed to get my first Moderna COVID-19 vaccination this morning, but it was canceled due to heavy rain, so I'm stuck indoors with little to do but surf the Internet. Jim Backus' character from 1963's It's a Mad, Mad, Mad, Mad World can't see because his eyes are closed, but there are things we can't see even with giant optical and radio telescopes. The most important of these is dark matter, which I have my doubts even exists. Beginning in the 1930s, astronomers noticed that there didn't seem to be enough observable matter (stars, gas and dust) in galaxies and galaxy clusters to account for their properties, notably the extreme velocities of rotating stars far from galactic centers. This gave rise to the notion of "dark matter" that would have to exist in gigantic halos surrounding galaxies and in between galactic clusters. Much more recently, detailed studies of gravitational lensing showed that there had to be more matter in galaxies than could be accounted for, thus supporting the idea that some kind of invisible matter existed in the universe besides ordinary matter. In defiance of the dark matter concept, in the 1970s it was proposed that ordinary Newtonian physics could be modified slightly to account for the effects of these observational discrepancies. A theory called modified Newtonian dynamics (MOND) arose that gave some promise along these lines, but it was deficient in numerous areas (and being a modified classical theory, MOND was also not relativistically correct). To fix this, further theories came along that modified Einstein's general theory of relativity in order to patch up the discrepancies. But these theories were complicated and required too many arbitrary parameters to fit the observational data, although they're still a topic of current research. Although his 1915 theory has admirably passed all tests to date, Einstein himself believed that it was only an approximation of the truth, although a very good one. Might some simple but reasonable modification of the 1915 theory be closer to the truth? This too is a topic of current reasearch, but everything I've seen to date seems too hopelessly complicated to be considered valid. Although dark matter might actually exist and be the answer to all our observational problems, I'm still clinging to the hope that Einstein's theory might yet be modified to provide a successful theory. One approach, and one that I think deserves more attention, was originally proposed in 1989 by Mannheim and Kazanas, who laboriously worked out the calculations associated with the fully conformal gravity theory deriving from the Lagrangian $$S = \int \!\! \sqrt{-g}\, \left( R_{\mu\nu} R^{\mu\nu} - \frac{1}{3}\, R^2 \right) d^4x$$ This Lagrangian automatically results in three parameters that not only reduce to Einstein's 1915 theory but also explain much of the data now being attributed to dark matter and dark energy. Meanwhile, here's an interesting video posted by the University of Oxford's Rebecca Smethurst, who questions the existence of dark matter while discussing a recent study that appears to explain the effects of neighboring galaxies on galaxies exhibiting dark matter-like properties.

 A Year and a Half — Posted Sunday January 24 2021 My dear wife Munira died exactly 18 months ago. I'm still taking an antidepressant and undergoing grief therapy, but things are gradually getting better. We were married 42 years, and it still doesn't seem real to me, as I vacillate between shock, grief and feeling sort of okay. Our church has been a tremendous support to me, as has been my family. Never stop appreciating those you love, as you won't have them forever.

 Geek Saturday — What is a Spinor? — Posted Saturday January 23 2021 All of the ordinary matter in the universe, the "stuff" that everything is made out of, is comprised of particles called fermions. They include elementary particles like electrons, quarks and neutrinos, along with composite particles like protons and neutrons. They're all characterized by half-integral quantum spin numbers ($$\pm$$1/2, $$\pm$$3/2 $$\ldots$$), while all the other things—the force carriers like photons, gluons and the Z$$^0$$ and W$$^\pm$$ particles—are called bosons, having integer spins (0, 1, 2 $$\ldots$$). Bosons get along with one another, and can be found clumped together in various quantum states, while fermions are antisocial loners that tend to avoid other fermions. Being fermions, multiple electrons can be found in atoms, but every electron must have its own unique set of quantum numbers. The helium atom, for example, can have two electrons in the same orbital, but one will have a spin of 1/2 while the other's spin will be -1/2. This is a consequence of the famous Pauli exclusion principle, which everyone learns in high school. One might guess that fermions and bosons have to be treated differently in quantum mechanics, and this is true. Unfortunately, the algebra that describes fermions (which make up all the familiar stuff) differs substantially from that of bosons, and that algebra is a tough act to follow. While the quantum-mechanical equations of bosons are fairly understandable, those of fermions are complicated and non-intuitive. They are described by something called the spinor algebra, which in practice is often referred to as a kind of "square root" of an ordinary vector in Euclidian geometry. In his latest post, Columbia University mathematical physicist Peter Woit also asks about spinors, but being quite conversant in the subject he seems to have no problem dealing with them. Compare this attitude with just about anyone else, including the late Sir Michael Atiyah, who often expressed frustration with spinors. If you're a mathematician, spinors will take you into all kinds of arcane areas, like group theory and topology (often in higher dimensions), but physicists prefer sticking to more mundane applications, where spinors are still difficult to comprehend because much of the math cannot be avoided. I remember one professor at USC touching on the subject of spinors, but he didn't elaborate, probably because he preferred to stay away from the subject. While learning the Dirac relativistic electron equation (which incorporates the Dirac spinor), I got hopelessly confused. It wasn't until many years later that I tried to improve my situation by writing an elementary paper on them, but even today I do not really understand the damned things. I still get a little ticked off when I think that God made the most common, ordinary stuff in the universe so difficult to comprehend.

 Thank God, the Trump Nightmare is Finally Over — Posted Wednesday January 20 2021 In the dark days of the George W. Bush presidency and in the far darker days of the Donald Trump presidency, I would often think to myself that the biggest mistake that both Lincoln and General William Tecumseh Sherman made in 1864-65 was to first allow the South to be spared total annihilation, and then to welcome Southerners back into the Union, "With Malice Toward None." What we got was a century of Jim Crow, lynched and murdered African Americans and "Lost Cause" stupidity, all under the guise of "Southern gentility" mixed with the enduring battle cry of "The South Shall Rise Again." And rise again it did. As the sentiment expressed in this article in today's USA Today makes clear, let us hope that President Biden will not repeat Lincoln's and Sherman's mistake. Sure, let us act like true Christians and try to be understanding and kumbaya and all that, but let us always remember that the Red States still hate progressives with a passion, and they now have vengeance and destruction in mind. If they will not turn away from their collective racism, bigotry and anti-science, anti-fact retardation, the best we can do is to cut them off from the Union entirely and let them cope on their own, perhaps as a collection of seceded states. I don't really want any more of my tax dollars going there now anyway, since they have been and continue to be a net sink on federal assistance.

 Is It Too Late? — Posted Tuesday January 12 2021 When was the last time you had a heated discussion with another over some ideological issue, only to come to the conclusion that she was right and you were wrong? And not only did you recognize that you were wrong, you wholeheartedly changed your mind and adopted your opponent's position? The 2020 presidential election ended with Joe Biden winning 80 million votes against Donald Trump's 74 million votes. That 6-million vote difference was decisive, but the total vote split was uncomfortably close—52% to 48%—meaning that roughly half the country's voters went for Trump. Not only that, but nearly 80% of Trump's supporters today devoutly believe a rampant conspiracy theory that Biden stole the election through fraud, despite some 60 high-level court cases and numerous bipartisan investigations that confirmed the legitimacy of Biden's victory. Add this to the number of crazy conspiracy theories that have sprung up following Trump's 2016 presidential win, including Hillary Clinton operating a child sex ring out of a Washington D.C. pizza parlor, that global climate disruption is a hoax designed to give China an economic edge over the U.S., that Barack Obama was born in Kenya and was thus ineligible to be President, and that the deaths attributed to COVID-19 are actually due to other causes like colds and influenza. I don't care if people want to believe in extraterrestrials or that magnets can cure cancer, but the insane beliefs of nearly 50% of Americans are too much for me to accept. Today's conservatives seem to believe that personal opinions, emotions and feelings are more legitimate than facts and objective evidence, and the tragedy of January 6 proves that these beliefs have taken a very dangerous turn. My son's best friend at university is now a respected medical doctor and specialist in nephrology. He's one of the most intelligent people I've ever met, but despite his education and training he's completely bought into the lies and conspiracy theories that Trump and his followers have promoted. This scares the hell out of me—if people as smart and educated as he is can be so completely and irreversibly hoodwinked by utter nonsense, then what hope can we have that this country can ever be truly sane? Alluding to my first paragraph, can Trump supporters ever change their minds, or are they permanently stuck in anti-fact, anti-science fantasy? Ross Douthat (pictured), a writer for the New York Times whose conservative views I have often disagreed with, wonders if the Republican Party can break away from the Trumpian insanity now threatening the country, or itself be broken permanently through its adherence to lies, paranoia and fantasy. It's well worth reading, and I hope it's not too late for the country to recover.

 Fury — Posted Saturday January 9 2021 Videos clips of the shameful, violent and murderous attack by Trump right-wingers on the Capitol Building this week reminded me of the classic 1936 film Fury, starring Spencer Tracy and Silvia Sidney and directed by the noted German film maker Fritz Lang. The movie features a mob attack on a jail, filmed by news camera crews whose films are later used in court to identify and convict the attackers. I urge readers to find and watch the film (most libraries have the DVD) as a lesson for how the mob mentality of 85 years ago is strikingly similar to what we saw earlier this week. Here's a brief YouTube clip of the final court scene, which I hope is repeated when those responsible for the Capitol attack are brought to justice:

 Trump IS the Snake — Posted Saturday January 9 2021 In 2016 President Trump read a poem to adoring followers at a Florida rally. Called "The Snake," the poem talks about a tender-hearted woman who kindly nurses an injured snake back to health, only to have the snake bite her. "You knew I was a snake when you picked me up!" says the serpent. (The story has been told many times in different forms, usually a frog who gives a lift to a scorpion across a river.) Trump's retelling was intended as a warning that being kindly to immigrants was a mistake, as they would surely turn on us (becoming thieves, rapists, killers, etc.) The crowd ate it up. I liken Trump's crowd as akin to the Israelites in Exodus 32 who, weary of waiting for Moses to come down from the mountain, fashioned the golden calf and partied. When Moses returned, things quickly went downhill for the Israelites. Now it's America's turn. The incredible irony of Trump's story is too obvious today, but it was evident long before he ran for president. A serial womanizer and sexual molester, the thrice married Grab-'em-by-the-Pussy Chief Executive had shown his true colors from the time he was a young man. On numerous occasions I sadly posted several links on Trump's current wife Melania, who posed for a series of sickening girl-on-girl nude photos twenty years ago here and here (Warning: graphic). "This is your new First Lady!" I raged at the time, although it seemed no one was paying attention. But no, Trump was a rich man, and his wives were all beautiful and hot, and that's all that mattered to the majority of American voters. Now Trump has finally been exposed for the monster he is, but his sycophantic base is sticking with him, now turned violent and murderous. Worst of all, they're all self-professed conservative Christians. Meanwhile, the GOP is still the Party of Trump. And it appears that things will only get worse for America.

 I'm Moving! (Someday) — Posted Thursday January 7 2021 From Hamlet, Act V, Scene I: Gravedigger: What is he that builds stronger than either the mason, the shipwright, or the carpenter? Assistant: The gallows-maker, for that frame outlives a thousand tenants. Gravedigger: I like thy wit well, in good faith. The gallows does well, but how does it well? It does well to those who do ill. Now thou dost ill to say the gallows is built stronger than the church ... Assistant: [So] Who builds stronger than either the mason, the shipwright, or the carpenter? Gravedigger: Cudgel thy brains no more about it, for thy dull ass will not mend his pace with beating. And when you are asked this question next, say "a grave-maker." The houses that he makes last till doomsday.

 King Tut — Posted Sunday January 3 2021 I've long been captivated by ancient Egypt, and I'm planning to visit the new billion-dollar Grand Egyptian Museum this year. I went to the Valley of the Kings with my late Egyptian wife and our sons several years ago, and now I'm longing to see the shriveled Mr. Tutankhamun* in person again, along with the other tombs in the Valley (my wife didn't think it was a big deal, having already seen everything as a child and as a University of Cairo chemical engineering student). Here's a fascinating recent video of the 1922 discovery of Tut's tomb: * He's got a condo made of stone-a

 Rambling Thoughts on Quantum Immortality — Posted Saturday January 2 2021 Happy New Year, and good riddance to 2020. Newton and many of his later contemporaries believed that if one knew the precise position and velocity of every particle in the universe, then one could rewind or fast-forward that information to know the past and future of everything perfectly. In particular, the initial conditions of the universe would mean that everything would evolve deterministically, with the result that all events in the future would be set for all time. There would therefore be no free will for humans, whose (admittedly very complex) collections of atoms and molecules would only be following a fixed set of events. Did you ever rob a bank or cheat on your wife? Don't feel too bad, you couldn't help yourself—like Calvinism, it was predetestined from the start. Or so some believe. But it's impossible to know such information to infinite precision (you'd have to know everything out to an infinite number of decimals), and chaos theory would seem to guarantee that anything can happen randomly if such precison is not available. So what does this have to do with anything? It means that free will really does exist (at least to some extent), that you weren't predestined to murder your mother-in-law (so it's to prison you're a-going), and more importantly the probability of any past or future event remains largely random and undecided. Indeed, probablity has everything to do with it. Whatever happens, its probability is either zero, one, or something in between. It's illogical to think that the likelihood of an event is 150% or less than zero. This principal is behind what is known as unitarity in quantum mechanics, which was outlined in a recent PBS Spacetime episode on the nature of quantum information (which you can watch below). Host Dr. Matt O'Dowd explains that unitarity involves both the preservation of probability (never less than zero or greater than one) and the time-reversal symmetry of physics, in which the replacement $$t \rightarrow -t$$ keeps fundamental physics intact. Not so, you might think. While a film of the elastic collision of billiard balls can be run backward without anyone knowing which way the film is running, the dropping of an uncooked egg on the floor and its breaking cannot be filmed without revealing the proper sequence of the event—it's a fundamental property of entropy, right? But the collision of real billiard balls invariably involves the transfer of energy (which can be revealed by a flash of infrared light when the balls are struck or the slowing of some of the balls due to friction), and this would give away the sequence. When energy is conserved there's no change in entropy, and time-reversal symmetry is preserved. As the PBS Spacetime episode explains, the fundamental Schrödinger equation of quantum physics preserves time-reversal symmetry, but the collapse of the wave function (according to the generally accepted Copenhagen interpretation of quantum mechanics) does not. Many physicists believe that this fact alone invalidates the Copenhagen interpretation, which has notably given rise to ideas like the many-worlds interpretation, in which wave function collapse does not occur (albeit at the expense of the branching off of other universes due to the mere act of observation). If true, this would seem to mean that the simple act of creating or transferring information by sentient minds or otherwise conscious observers somehow gives rise to multiple universes. The connection of information with unitarity culminates with the notion of the eternal preservation of information, which when created cannot be destroyed. Exactly how information is preserved is a mystery—some believe that the universe stores everything on its boundary surface via the holographic principle. This principle (actually a conjecture) would seem to answer the so-called black hole information paradox, in which information falling into a black hole is either lost or somehow preserved when the black hole evaporates. All this is getting pretty metaphysical if not downright religious in tone, so I'm stopping here. Meanwhile, enjoy the video: