The basic idea is that in the end, all matter is in black holes, the rest is radiation. You need matter in order to define space, so if there is no matter, space or rather the original space doesn't exist anymore.
You can contract all the radiation (that doesn't have a notion of space due to the lack of matter) into a new point and start something like a big bang.
I think of it as redefining the space that makes the universe, rescaling the size of the whole universe. Anyway, that's my personal take on this so far.
I think of it as redefining the space that makes the universe, rescaling the size of the whole universe. Anyway, that's my personal take on this so far.