Odin did it. Oh wait, here is a better one: We don't know. There you go. At the moment, no one is certain, that does NOT mean god didit. At one point, we didn't know how humans stayed on the earth, we then discovered gravity. We didn't know how humans were created, then discovered evolution. Etc. One day (if we are not all killed off) we will eventually know the answers to the bigger questions. If you are too simple to understand a whole sentence or two about the universe, then you should just stick with whatever god you have decided was the real one. When has the most dumbed down answer equal the correct one anyway?