Favorite talks
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Garik Israelian: How spectroscopy could reveal alien life
15:52 Posted: Oct 2009
Views: 266,679 | Comments: 64
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Jacqueline Novogratz: A third way to think about aid
17:04 Posted: Sep 2009
Views: 217,082 | Comments: 46
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Bonnie Bassler: How bacteria "talk"
18:14 Posted: Apr 2009
Views: 1,229,563 | Comments: 357
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Richard Dawkins: Militant atheism
29:10 Posted: Apr 2007
Views: 2,026,850 | Comments: 5854
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Julia Sweeney: Letting go of God
16:32 Posted: Jul 2006
Views: 1,206,717 | Comments: 714