My own (yet unpublished) novel, “The Left Hand of Light,” has a lot in common with this article from Popular Science.
Now that scientists are looking for evidence of matter moving between universes, I need to find an agent quick!
From the article:
The notion of multiple universes is one that cosmologists like to theorize about but generally don’t relish proving, mainly because doing so would be very difficult. But a team of researchers that showed a few years ago how matter might travel between our universe and others now think they ought to be able to observe this phenomenon in action using existing technology, lending credence to the multiverse theory.
Consider this: If matter can move between universes, so can information. What we call spirits and ghosts may well be simply energy, beings, or remnant information leaking into our own universe.