The theory that the universe started with a (the) big bang has not solved the ancient paradox, of where the universe started or what it was created from.
If we look back in time, the universe was compressed into a black hole, and before that in a singularity.But a singularity equals nothing.
So the question remains: Was the universe created from nothing? and what was there before this nothing?
Nothing is nothing.
Nothing can come out of nothing
Nothing cannot turn into something
so a universe created out of nothing is logically impossible
so the question remains, what was there before the universe came into existence?