What are Parallel Universes? Have they done any research or experiments on this?

Answer

Our universe is our universe, the system of everything we can perceive.

That universe appears to comply with a number of laws, which we cannot really explain on the basis of other preceding principles. So it is just that way and nothing else. Why then? some wonder. A possible answer to this is that it could have been different (for example universes in which the sun and planets pull together harder or less hard), and that there must be other universes where things are different. Our universe is one of many.

The annoying thing is that we can learn little or nothing about those other ‘parallel’ universes. We can only do experiments within our universe. But there may be possibilities where information about possible other universes can penetrate ours, but we have no real indications for that. That’s ideal for movies: if we can’t know anything about it, they can fantasize a lot about it!

Conclusion: read books instead of watching movies…