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AMA | February 2023
Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
Is There a Black Hole?
There are various proofs going back to Penrose and Hawking. They say that if you get enough energy into one place of the universe, then there needs to be a singularity either in the future or in the past. The equations of general relativity do not pick out a direction of time. So why would anyone think that this was a sensible thing to say we live inside a black hole?
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