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I've heard that stuff sucked up by a black hole leads to a parallel universe, but I don't believe that because when a black whole "sucks" something up, the thing it "sucked" up adds to the black holes mass, how would it do this if everything it sucked up was ejected out a white hole on the other side of the universe? I want to know where stuff really goes after being "sucked" up by a black hole. According to Wikipedia,
The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
This is why dying stars form black holes. This means a black hole must be a very compact sum of mass in a small area, or a singularity. Because of this, I think when something gets sucked up by a black hole, it just gets crushed up to a very small volume and adds to the singularity. Am I wright or not?