When the ideas of existence of dark energy actually brings about that our universe could become everything we can see all this can be just a tiny little part of a much grander reality what we call multiverse. There is a picture of that perhaps. You can see the little yellow circle, thats pretty much what we can see around us. If measurement and theories are correct our own universe is infinite in time. This idea of the multiverse is all of that is but a tiny piece of a much grander reality, a multiverse which is made up of many marbles like in this case which are different kinds of universes, each one of them a different loss of physics and an even and thats a sophisticated idea that we brought in to explain the mr. Of the dark push. We dont know if if this makes sense but we dont know if we will ever be able to prove or disprove these ideas. This is very controversial and yet a very exciting but it goes at the heart of one of the biggest questions ever, why are we here and what doesnt