Why can't we see evidence of alien life? - Chris Anderson | TED-Ed - discu.eu

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Why can't we see evidence of alien life? http://ed.ted.com/lessons/why-can-t-we-see-evidence-of-alien-life 21 comments 26/4/2012 space

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Visualizing the possibility of intelligent life in the Milky Way | TED Blog http://blog.ted.com/2012/09/05/visualizing-the-possibility-of-intelligent-life-in-the-milky-way/ 19 comments

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