What is the 'end' of the universe? Is it the most distant star, mote of dust, particle? Of course not, because we can always ask the question, how much nothingness comes after that? That is a question we can grasp. Does the universe expand outwardly until the very fabric of spacetime dissipates into nothingness, where no energy can exist? Does spacetime just loop back in on itself in a 4D sphere, or saddle? All this means is that we cannot travel, see or measure anything where there is no spacetime. So in what context does spacetime exist? By what mechanism does spacetime have any meaning? Or is spacetime synonymous with existence? Is there nothing else at all to explain? This discussion always leads me to the conclusion that the fact that there is anything; matter, spacetime, anything at all, is purely absurd. Our whole existence seems fantastically mythical.