I was actually looking into a scientific theory about how ghosts and our paranormal experiences can be explained through multiverse theory. It says that because multiverse is now possible (due to the discovery of gravity waves) one and or two things can be occurring: 1. Visitors (you know what I mean) 2. Our universe may be overlapping with another universe, or rather, synchronizing with it. It's total speculation but it was pretty fun to imagine the two having some sort of correlation (science and paranormal).