Black hole cosmology suggests that the Milky Way and every other observable galaxy in our universe is contained within a black hole that formed in another, much larger, universe.
The theory challenges many fundamental models of the cosmos, including the idea that the Big Bang was the beginning of the universe.
It also provides the possibility that black holes within our own universe may be the boundaries to other universes, opening up a potential scenario for a multiverse.
Mine blown 🤯
No because it is just so crushingly huge. I mean maybe humanity could understand and even partially explore the universe at some point. But trying to understand a universe within a universe, fuck that. Whose to say it is not a sequence of universes?