Please! I think they concoct these wild theories just to get fame and recognition.
There is ONE universe. The “uni” in universe means “one.” Whatever there is, no matter what you call it, it all belongs to the universe, and there’s only one.
“Entities should not be multiplied without necessity” especially when there is no way of observing those supposed entities.
Well, they’ve gotta account for all that missing Dark Matter somehow!..................
I don’t know. A university is a black hole for tuition and tax money.