I was doing some research online tonight about the Big Bang for the lesson I'm teaching tomorrow morning, and I came accross this site: Archive of Astronomy Questions and Answers I think it's one of the best, objective, scientific answers to the question of what started the Big Bang. It may seem like a cop-out to some of you, but scientifically, the author is correct. Not to say that the question isn't valid. It is, and many scientists have tried to answer it. But the question is not one that can or should be answered by the Big Bang theory. Rather, there must be a new theory to explain it.