What does it even expand into like in terms of displacing the presumably “Nothing” that previously existed or didnt exist when the universe expanded and should have displaced or subsumed it?
What does it even expand into like in terms of displacing the presumably “Nothing” that previously existed or didnt exist when the universe expanded and should have displaced or subsumed it?
I think it’s pretty well established through empirical observation that the universe is expanding, based on all our current understanding of the universe. We don’t know WHY, and we don’t understand how, but it’s not really under debate at this point as a fact.
What happens inside a black hole is entirely and utterly unknown, and it’s such a crazy mind bending concept that anything we theorize is as close to informed speculation as you might get.
I’d heavily take with a grain of salt anything that replaces something we know as well as you can observe with a theory that goes something like “well maybe we’re inside a black hole.”