Sean Carroll responde  (da única forma possível: cientificamente) à pergunta (religiosa) de Henrique Raposo: "We don't know"

"The 'Big Bang' is our label for the moment in time when the universe had infinite density. There was probably no such actual time, since quantum mechanics must have been important then. The label is a placeholder for what we don’t yet understand"

"Despite all that we don’t know, I remain optimistic that we are actually making progress here. I’m pretty hopeful that within my lifetime we’ll have settled on a leading theory for what happened at the very beginning of the universe" (Preposterous Universe)