The theory of the Big Bang that I have known all about, most my life states that: In the Beginning there was a little dot that nobody knows how it got there but it had all the matter of the entire universe crammed into it and the tiny dot couldn't handle it all and so BOOM it exploded with a big bang and everything in the universe is came into being everything you see and it kind of ties in with evolution. I would rather just trust the Bible, it says 6 days and I believe it, the original word used in that instance( I don't remember what language) is YOM and it means a 24 hour period, and it is also used when it refers to Jonah in the whale, Jesus when he fasted in the desert and several other instances. I can show you more examples when I find the book that talks about it. I believe that you are pretty strong rooted Christian but I believe the WHOLE Bible and it WAS six literal days. I get most of my apologetics resources(including that book) from AnswersInGenesis.org I also just want to say that science and the Bible go together no matter what people say.