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Where Are The Aliens? The Search For Extraterrestrial Life Subscribe to Science Time: https://www.youtube.com/sciencetime24 For more than four decades, astronomers have been searching for techno-signatures: Signals coming from distant alien civilizations. So far, scientists have found no convincing evidence for biology beyond Earth. It is ...
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The Roswell Incident  In July 1947, something crashed in the desert...
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