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<[Alan]> > if you go straight long enough you wind up where you were
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There's this story in Martin Gardner's "Aha! Gotcha" about a space traveler who follows the geodesic all the way back to the point of departure. Not only that, but his universe is a non-orientable manifold (think 4d mobius strip) so he's now a mirror image of his original self...his heart is on the wrong side.
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