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3min chapter
AMA | June 2023
Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
The Importance of Time Reversibility in Black Hole Events
In a black hole, there is already a time orientation to the event horizon. So it's not like a glass shattering on the ground. What you can do is imagine time reversing the whole shebang and then you get a white hole. The idea of a black hole is by itself irreversible. How different could an alien physics or cosmological theory be given that they are looking at the same universe but perceive it very differently?
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