Anyone who thinks God wrote the Bible is insane. But supposedly what he did was give the knowledge of it to someone some way and they wrote it. I'll admit if god is real that is quite possible. But I see no logic behind it so I don't believe in it. And the Big Bang technically started outside the space-time continuum. That is a place where everything and nothing is possible because there are laws of physics. This would mean a fraction of the possibilities would be to create a universe. It is only theorized that it was an explosion of infinite mass and infinite density. This mean that anything could have caused the Big Bang and it could have different starting positions of everything based on how it was created.