Favorite talks
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A robot that flies like a bird
06:19 Posted: Jul 2011
Views: 2,293,807 | Comments: 395
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Bill Gates: Mosquitos, malaria and education
20:16 Posted: Feb 2009
Views: 1,385,671 | Comments: 435
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Nellie McKay sings "Mother of Pearl" and "If I Had You"
05:34 Posted: Jul 2008
Views: 290,743 | Comments: 55
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David Gallo: Underwater astonishments
05:27 Posted: Jan 2008
Views: 8,191,713 | Comments: 433