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The theoretical discipline concerned with the search for, and study of, material remains and artifacts left by non-human, extraterrestrial intelligences. It’s the ultimate cold case file, applied to cosmic scales. This isn't about digging up bones, but about detecting and deciphering the "technosignatures" of a civilization—whether that’s a derelict megastructure orbiting a distant star, the ruins of an outpost on a dead moon, or the puzzling geometric patterns of a long-vanished city. It requires thinking like a species that isn’t human.
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