The Big Bang wasn't the beginning of the universe.
It's a story as familiar as one of Aesop's Fables: A long, long time ago, the universe began as an infinitely small, dense point called a singularity. Then, all of a sudden, BANG! In a trillionth of a second, it expanded faster than the speed of light to form the universe we know today. Well, it turns out that the popular understanding of this cosmological origin story isn't entirely accurate — and scientists have known that for decades. There was probably no singularity, and the expansion of the universe after the Big Bang happened at a snail's pace compared to the expansion that came beforehand. Yes, beforehand: The Big Bang wasn't the beginning of the universe.
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