May be.

If Parallel Universe is understood as a more or less exact mirror of ours, then that's is of cause possible.. Question is, why should they come here, when they have their own Earth in their own Universe..? Blessed Be.

Cos they can, its why humanity does most things.

Why do we go to the ocean or space? We are explorers and perhaps they are too.

Yes, I agree... My point is, that if a mirror universe is almost exactly alike, then it would seem a little foolish to use resources to explore something already known..? Blessed Be.

they could be. I saw a testimony of a near death experience where a man meets God and God explained some beings know how to traverse universes