Now, what I am going to say is pretty cool. Our universe could be in another universes black hole, which that universe is in another universes black hole, so on, so on, so on. We could be already in a black hole. Strange to think this but can be true. That being said, there could be universes in our black holes inside of our universes creating an endless paradox of ever changing black holes. And for all we know, the aliens in we think of could just be us inside of a universe that is not our, which is in a black hole.
This is a lot of stuff, so I thanks you for reading.