Question

What Came Before the Big Bang?​

Answer 1

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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, for some reason, the Big Bang occured. This extra-dense universe may have been governed by quantum mechanics, the physics of the extremely small scale, Carroll said.

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Answer 2

✨ANSWER✨

Some theories suggest that, before the Big Bang, whatever existed was contracting, rather than expanding, as our universe is today. Perhaps what was contracting was an earlier universe, for example. If so, what we perceive as a Big Bang was actually a part of a Big Bounce. But a popular theory of our universe, called the inflation theory, doesn’t call for the idea of a previously contracting universe.

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