Origins: Where are the Aliens?
Journey back to the beginning of everything: the universe, Earth, and life itself.
Expired: 12/15/15Video has closed captioning.
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Funding for NOVA is provided by David H. Koch, the Corporation for Public Broadcasting and PBS viewers. Original funding provided by Microsoft, Sprint, the Park Foundation, the National Science Foundation, NASA, the Alfred P. Sloan Foundation, George D. Smith, the Corporation for Public Broadcasting, and PBS Stations