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Will the real ET be little green men or little green bacteria? SETI Institute Senior Astronomer Seth Shostak theorizes what our first alien encounter might be like. Space: Alien Speculation More Videos Online

Space: Alien Speculation

Will the real ET be little green men or little green bacteria? SETI Institute Senior Astronomer Seth Shostak theorizes what our first alien encounter might be like.

Added: Feb 23, 2009
Views: 41284 Views
Runtime: 02:44

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