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Continue to ChatIf the rate of expansion one second after the Big Bang had been smaller by even one part in a hundred thousand million million, it would have recollapsed before it reached its present size. On the other hand, if it had been greater by a part in a million, the universe would have expanded too rapidly for stars and planets to form. - Stephen Hawking from https://whatsmyquote.com/quote/if-the-rate-of-expansion-one-second-after-the-big-bang-had-been-smaller-by-even-one-part-in-a-hundred-thousand