Alright. So I have an idea, and I'm not sure if it has been thought up yet. So, We all know what the Big Bang is. I'm going to assume that you've heard of the big "Crunch", I believe it was called. Well, What if when the Universe comes together, or "crunch's" a big bang happens. All of the Universes energy all in one place HAS to cause something. So, maybe just maybe the Universe has been around FOREVER as in it is infinite, but as we know infinity cancels out infinity, although if I'm correct and the Universe "recycles" itself, the infinite amount of possible things couldn't of happened, if you understand where I'm going with this. So, when all that energy is together a big bang occurs thus seeding space with the Universe once more in an everlasting chain. SO, Maybe the Universe recycles itself, for lack of a better term.