Is there a theory that the beginning and the ending of the universe are directly connected to each other? And that time doesn't so much start over and return to the starting point on a circle, so to speak?
To me it's more satisfying than the idea of https://en.wikipedia.org/wiki/Heat_death_of_the_universe
So, in a sense, the heat death is not so different from the big bounce.
Unfortunately I did not bother to bookmark what I had read, and can no longer find a name or anything referring to it on the internet.