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A comment on First proof that "plunging regions" exist around black holes in space. Parent comment
Recent Veritasium video: https://www.youtube.com/watch?v=6akmv1bsz1M
Wiki: https://en.wikipedia.org/wiki/Penrose_diagram
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Recent Veritasium video: https://www.youtube.com/watch?v=6akmv1bsz1M
Wiki: https://en.wikipedia.org/wiki/Penrose_diagram