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Space / Extraterrestrial life / Fermi paradox / Exoplanetology / Search for extraterrestrial intelligence / Extrasolar planet / Self-replicating spacecraft / Extraterrestrial Civilizations / Planetary habitability / Astrobiology / Spaceflight / SETI


1 Introduction: Where is Everybody? DR
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Document Date: 2013-02-21 02:50:08

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