Most talk on multiple universes tend to be about parallel universes and are trendily called “multiverses”. But why do universes have to be parallel? Why can they not be independent universes occupying their own patch of space, its light yet to have reached us.
I call these non-parallel universes. Perhaps beyond our universe’s edge in space is another universe created out of a big bang like our universe had been. Who is to say there has to be only one universe? Perhaps two (or more) universes have come together already and we have not noticed the evidence.