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Intelligent civilizations rarer than one in a million - UC Berkeley
URL: http://newscenter.berkeley.edu/2013/02/08/intelligent-civilizations-rarer-than-one-in-a-million/
Submitted: Sat Feb 09 2013
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CT: UFOSeek News 2013: Intelligent civilizations rarer than one in a million - UC Berkeley
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Intelligent civilizations rarer than one in a million