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    Feynman diagram tattoo suggestion

    Hi all After many months of contemplating, coming up with tattoo ideas, waiting a few months to see if I still like that idea, etc etc, I've settled on getting a Feynman diagram for many reasons, but having a but of trouble settling on one in particular. I've seen a few with the standard...
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    Confusion about quantum foam, quantum gravity and singularities

    Hi all, I've just finished reading a book about Black holes (Black holes & time warps, by Kip Thorne) and there's something in particular I'm confused about. One chapter talks about what can possibly be inside the singularity, specifically what would happen to an astronaut as he falls...