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One possibility is that an inflationary event was our big bang, and anything that happened before that point will probably be impossible to measure. But he added, “If you are a multiverse person ...

Big Freeze, Big Rip, Big Crunch ... Since they can’t prod actual universes as they inflate and bump into each other in the hypothetical multiverse, physicists are studying digital and physical analogs ...

“It sets up the conditions for the big bang—like a prequel,” says Guth ... Are there any drawbacks to living in a multiverse? The problem with having an infinite multiverse is that if ...