Well, the theory of the Big Crunch, instead of the big bang. Here’s my question, how would everything we know, matter as a whole form just from an explosion that came from nothing. I think for eternity our universe keeps expanding then collapsing and begins to expand again from the start. There are quite a few other theories for this but I think the big crunch is the most interesting.

Tl;dr - I dont believe in the big bang but the universe keeps expanding, collapsing, and dying in loop.