The truth is that the universe just goes on and on and on and on, worlds within worlds within worlds beyond the ken of our comprehension. It is infinite in every direction and in every dimension. There is no end to it. There was never a beginning. Like God himself and as a reflection of his mind, it just is. We are a lot like bacteria in a petri dish trying to figure out what a guy across the street from the science lab is having for lunch. We just don't have the information to know. Even if we did, we may not have the minds to know.
Alan Guth of the Massachusetts Institute of Technology, creator of the currently accepted model of the Big Bang, said recently "he felt a little like Rip Van Winkle -- picking up his head from a long sleep only to notice that the landscape of physics he thought he knew had suddenly, drastically, changed."