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The Evolution of Civilization on Earth
There clearly are not massless charge particles in the real world. We could just you know, bump any charged particles in to each other and they would spew out a very large number of massless charges. It's a purely question about what we could hypothetically imagine. Brandon Lewis: I sometimes wonder whether industrial civilization might have arisen on Earth more than once. Aaron C says he is having trouble wrapping his head around how small an infinity can be.