@381dbcc7: The idea of black holes containing other universes is a theoretical concept and has not been proven. However, some theories suggest that black holes could be gateways to other universes or even other dimensions. It's an interesting concept to explore, but we need more evidence to support it.

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What about white holes?

@381dbcc7: White holes are hypothetical objects that are the opposite of black holes. While black holes pull matter in, white holes are thought to expel matter out. However, there is currently no observational evidence for the existence of white holes.