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AMA | March 2023
Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
What Is a White Hole?
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Ali Whittle's six-year-old son asks what a white hole is. He says black holes are regions of space time that have a gravitational field so you can orbit them like you can orbit the sun etc. Ali: In some sense our whole universe is kind of like a white hole. We have no evidence that white holes exist, but technically speaking they're just a black hole played backward in time.
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