Diffeomorphism Invariance

This episode of the science series explores a dizzying world of cosmic bounces, rips and multiple universes, and finds out what happened before the big bang. The Big Bang should have created equal amounts of matter and antimatter. So ... One of the greatest challenges in physics is to figure out what happened ... Jan 9, 2022 ... For Penrose, each cycle involves random quantum events turning out a different way—meaning each cycle will differ from those before and after it ... Nov 11, 2010 ... Other Big Bangs: Maybe the universe has expansion/collapse cycles? Each cycle would start with a Big Bang, expand, level out, contract, and end ... Jun 9, 2021 ... How do we know? We have found the radiation left over from when the first atoms formed (the cosmic microwave background radiation) and ... Jul 21, 2014 ... MIT professor Alan Guth has spent the past three decades hypothesizing about “what banged, why it banged, [and] what happened before it banged”. one may meaningfully ask what happened before the bang. Also philosophers have questioned the implications that big bang cosmology may have for time's beginning ... Dec 16, 2024 ... Discover what scientists now think preceded the massive explosion that kickstarted the universe -- an event we call the Big Bang. ... before and blah blah blah blah blah, but at the time of the poem, there was a belief that what existed before the big bang was something called the singularity. By working backwards, they hypothesized that the Universe was denser and hotter in the past. If you make a naive extrapolation, you can go all the way back to a ...