The No-Boundary Proposal

Apr 8, 2011 ... Not knowing what came before the Big Bang doesn't stop physicists from theorizing. In the eternal inflation scenario, the known universe bubbled out of a ... 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 ... Mar 31, 2020 ... by Dan Hooper. Read. Before Einstein, how the universe began was a question for theologians, not scientists. Over a century ... Apr 21, 2020 ... One of the earliest string theory notions is the "ekpyrotic" universe, which comes from the Greek word for "conflagration," or fire. In this ... May 22, 2001 ... Review of various imaginative theories offered by cosmologists to explain what might have existed before birth of universe; drawings (M) Jun 30, 2007 ... The idea that the universe erupted with a Big Bang explosion has been a big barrier in scientific attempts to understand the origin of our expanding universe. Apr 17, 2019 ... It's possible that before the Big Bang, the universe was an infinite stretch of an ultrahot, dense material, persisting in a steady state until, ... Apr 22, 2020 ... In this scenario, the horizon is defined as how far observers can see before the bounce occurs. “The distance that light can propagate before ... ... before time: what existed before the fabled big bang. Semi-Technical ... the universe began,” which is angering traditional advocates of big bang model. Oct 20, 2022 ... Space didn't exist until the Big Bang. In fact, the Big Bang was not only the beginning of space, it was also the beginning of energy and matter ...