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  1. sjastro

    Don't get king hit by a shrimp.

    Instead of the lights going out they literally turn on.
  2. sjastro

    Emotional Sabine Hossenfelder talks about her experiences in academia.

    Sabine's videos have been used to support various opinions on this site, in this video she talks about how academia has treated her. This inside account holds far more water than the opinionated and ignorant academic bashing which goes on here. In private industry as opposed to academia my...
  3. sjastro

    Population III stars discovered?

    For the Dr Becky fan club her summation of the story.
  4. sjastro

    YEC is physically impossible

    I've decided to post this thread in the Physical and Life Science forum instead of the Creationism and Evolution forum as it deals with debunking YEC when it presents itself as a "science" (creation science) rather than a purely literal interpretation of the Bible. A typical YEC argument is...
  5. sjastro

    Scientists don't require time machines to study craters.

    In a thread which was shut down by moderators, the subject of the Chicxulub crater was raised with the tired old creationist argument one needed a time machine to prove such a crater existed and caused by an asteroid impact. The oldest impact structure found on Earth is the Yarrabubba impact...
  6. sjastro

    A nuclear reactor run by students.

    A video which includes interesting scenarios such as what to do if your accidently drop your mobile phone into the reactor. The reactor has a SCRAM button if the reactor goes out of control, the origin of the acronym SCRAM dates back to the first reactor built by Enrico Fermi at the...
  7. sjastro

    AI learnt "something" from the Physical & Life Sciences Forum.

    In April of this year I asked Bing this applied mathematics question. Explain how the Schwarzschild metric when expressed in Droste-Hilbert coordinates results in the speed of light being anisotropic. Calculate the difference Δv between the radial and peripheral velocity of light at the Earth’s...
  8. sjastro

    JWST infra-red image of Uranus.

    Amazing image. General view also showing some of its moons. Note the background galaxies in the image as well.
  9. sjastro

    Einstein's report card.

    Evidently Albert was a bit of a slacker.
  10. sjastro

    Idiot GPT-3 chatbot suffering from hallucinations.

    First of all some geography, Bass Strait which separates the Australian continent from Tasmania. I have never been trusting of AI chatbots particularly with complex scientific questions but I read somewhere if you ask truly incoherent and illogical questions AI chatbots will "hallucinate"...
  11. sjastro

    2023 Ig Nobel Prizes.

    With the 2023 Nobel Prizes winners to be announced commencing from Oct 2nd, the Ig-Nobel Prize winners were revealed in September. THE 2023 IG NOBEL PRIZE WINNERS CHEMISTRY and GEOLOGY PRIZE: Jan Zalasiewicz, for explaining why many scientists like to lick rocks. LITERATURE PRIZE: Chris...
  12. sjastro

    The 7 stages of AI

    There are approximately seven stages of AI development. In the mid-2020s, we are at Stages 3 and 4. See AI. Stage 1 - Rule Based AI Tasks have clearcut rules. Expert systems were the first AI. See expert system. Stage 2 - Context Awareness System learns from past interactions. Examples are...
  13. sjastro

    1 + 2 + 3 + 4 +…..+ ∞ = -1/12?

    This has been doing the rounds over the internet for years, intuition tells us the equation is rubbish as the sum should be infinitely large but was given traction in the early 20th century by perhaps the greatest mathematician in history Srinivasa Ramanujan. This equation has found its way...
  14. sjastro

    The Dancing Plague of 1518.

    Hnndreds literally danced themselves to death.
  15. sjastro

    14 New Images from the James Webb Space Telescope

    A thirty minute long video which also describes the science behind each pretty picture.
  16. sjastro

    An experiment with Bing chatbot.

    With all the chatbot posts in this forum, I decided to test Bing with science and maths questions of various difficulty. (1) Explain how the Schwarzschild metric when expressed in Droste-Hilbert coordinates results in the speed of light being anisotropic. Calculate the difference Δv between the...
  17. sjastro

    How the Black Death shaped human evolution.

    The fourteenth-century bubonic plague pandemic known as the Black Death was caused by the bacterium Yersinia pestis and killed up to half the population in Europe, the Middle East, and North Africa. The pandemic was more likely to kill those who did not have the genetic variants that protected...
  18. sjastro

    The most dangerous human invention...Drum roll

    Not the atom bomb or an institution that helps moronic sociopaths achieve power but.............
  19. sjastro

    De-extinction of Tasmanian Tiger

    The tasmanian tiger or thylacine became extinct in 1936. Scientists in several countries are engaged in dedicated projects to bring extinct animals back from the dead — from the thylacine to the woolly mammoth, the passenger pigeon to the gastric-brooding frog. Research groups like...
  20. sjastro

    Why there are no large impact craters on Earth.

    While the Earth’s atmosphere can play a role through factors such as such as wind and water erosion in erasing the visual evidence of impact craters it is a secondary mechanism. The size of an impact crater is a function of the kinetic energy KE of the object striking the surface. The KE is...