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Search - Extraterrestrial civilizations
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Extraterrestrial civilizations Author: Extraterrestrial Civilizations — "The number of planets in our galaxy on which a technological civilization is now in being is roughly 530,000." A bold statement, but one which Asimov supports with highly convincing evidence. Ever since the concept of other worlds was put forward in the fifth century B.C., scientists have struggled to answer tha... more »
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