Favorite talks
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Play
Peter van Uhm: Why I chose a gun
17:10 Posted: Jan 2012
Views: 865,655 | Comments: 561
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Play
A robot that flies like a bird
06:19 Posted: Jul 2011
Views: 2,323,534 | Comments: 396
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Billy Graham on technology and faith
26:20 Posted: Jul 2008
Views: 482,018 | Comments: 701