Question

what came before the big bang?​

Answer 1

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.

Answer 2

The big crunch where the universe collapsed into a tiny speck before it blasted(the big bang). Now please understand all this is just a theory as no humans were born at that time XD.

hope this helps

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