Could the big bang have started with a black hole exploding?
Answers
I think it will be a black hole
No, not exactly, but I encourage you to continue thinking along those lines.
One of the ideas floating around is that the matter that goes into a black hole forms another universe. Of course, as with anything in cosmology, you'll find people who vehemently disagree. I myself have some problems with that, as black holes don't live forever, and it seems like our universe will continue to expand forever. However, perhaps there's some time transformation that makes that work out. After all, we do get weird times with things falling into black holes.
One of the ideas that follow from that is that each universe spawned from a universe through a black hole has slightly different constants. This would mean a kind of evolution of universes. Universes good at making black holes would have more children, so to speak. After a while, the multiverse, for want of a better word, would have a high population of universes good at making black holes.
Is it true? I don't know. I don't know how to tell. But these are the kinds of thoughts that inspire people to become scientists, and we could certainly use more scientists, even if we have enough black holes.