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24 | Kip Thorne on Gravitational Waves, Time Travel, and Interstellar

Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

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The Importance of Simple Thought Experiments

Jim Hardlin and Greg Fuellier were students of Murray Gellman at Caltech. They developed a theory for quantum mechanics that can handle the presence of a time machine. But once you've done that, they discover that information gets lost. Some physicists don't like this but it leads to interesting insights into questions people really care about.

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