Here is an interesting take on how cosmic stuff relates to other cosmic stuff with some notable symmetries. Or.........
https://www.quantamagazine.org/the-origin-of-time-bootstrapped-from-fundamental-symmetries-20191029/?utm_source=pocket-newtab
speaking as an ex-palaeontologist, i am skeptical of this philosophy:
QuoteRather, spatial correlations between the positions of objects such as galaxies tell a detailed story of the ancient past. "Paleontologists infer the existence of dinosaurs to give a rational accounting of strange patterns of bones," said Nima Arkani-Hamed, a physicist and cosmologist at the Institute for Advanced Study in Princeton, New Jersey.
in what way are "strange patterns of bones" evidence for inferring the existence of dinosaurs?
aren't the presence of bones themselves good enough?
and why are bone patterns "strange?"
i have always watched cosmologists wave their hands furiously in explaining things, but i think waving them about palaeonotlogists is uncalled for.
on the other hand, this image simply exceeds my capacity for wonder:
(https://d2r55xnwy6nx47.cloudfront.net/uploads/2019/10/UltraDeepField-NASA-2000x1500.jpg)
Quote from: billy rubin on November 06, 2019, 12:35:42 AM
speaking as an ex-palaeontologist, i am skeptical of this philosophy:
QuoteRather, spatial correlations between the positions of objects such as galaxies tell a detailed story of the ancient past. "Paleontologists infer the existence of dinosaurs to give a rational accounting of strange patterns of bones," said Nima Arkani-Hamed, a physicist and cosmologist at the Institute for Advanced Study in Princeton, New Jersey.
in what way are "strange patterns of bones" evidence for inferring the existence of dinosaurs?
aren't the presence of bones themselves good enough?
and why are bone patterns "strange?"
i have always watched cosmologists wave their hands furiously in explaining things, but i think waving them about palaeonotlogists is uncalled for.
on the other hand, this image simply exceeds my capacity for wonder:
(https://d2r55xnwy6nx47.cloudfront.net/uploads/2019/10/UltraDeepField-NASA-2000x1500.jpg)
The Hubble 'Deep Field' image in my opinion one of the most impressive and important manifestations of science. Astonishing.