I don't think that anyone understands them. The frustrating thing is that if there are parallel universes there is, as far as anyone yet knows, no way to know if they are there at all. The reason people think that they might exist is based on the theory of black holes. It just so happens that if you play with the math used to "derive" black holes you can see that it makes sense to talk about a place just like our universe "on the other side" of the black hole. What do you think about that? I guess that the question is, if something can exist mathematically does it really exist?

I'm afraid that everything I know about parallel universes I learned from Star Trek.I think the idea is that you could have another universe perhaps like ours but where a few things went a different way. Perhaps there is another universe out there where everything is the same but Bob Dole won the election instead of Bill Clinton. Some things would be quite different but most would be the same. I don't know if there is really such a thing as a parallel universe. It's possible, but no one has found one. Can you think of any way to find one?