The big bang "didn't" happen, it is still happening. The whole thing about the big bang is that space is infinite, as well as being redundant at the same time. Its hard for me to explain how this is possible, and its hard to imagine at first. If you all really are interested in this type of information, and aren't just here to stick your two cents in, I suggest reading "A Complete History of Nearly Everything" by Bill Bryson. It gives you facts and equations, but it is written in a way that the information isn't impossible to decode. Its all pretty fascinating, and while being from a purely scientific standpoint, it laterally gives creedence to there being some kind of intelligence to the design. I'm not in any position to guess at what that intelligence is, but it sparks the imagination. If you read this book, and are interested in more, I would say check out "The Elegant Universe" by Brian Greene. This is a little more flexible in the fact department, adding neutrinos, superstrings, and multiple dimensions to the mix. Very interesting, if not a little technical. I got goosebumps while reading it.