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The answer to, and winner (if any) for, our last contest question of: This sci-fi short story is set in 2055. It's the most republished science fiction story of all time. Name it and its author. Here's a clue, "Butterfly". IS "A Sound of Thunder", by Ray Bradbury. The story is about time travel with this warning - don't tamper with the past, a little change then can alter history in a big way n…