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![]() Date: 2004-11-17 13:06:00Spaceflight Search for extraterrestrial intelligence Fermi paradox Communication with extraterrestrial intelligence Active SETI Post-detection policy Carl Sagan Interstellar communication Space colonization Astrobiology SETI Extraterrestrial life | Source URL: www.setileague.orgDownload Document from Source WebsiteFile Size: 83,18 KBShare Document on Facebook |