Favorite talks
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Play
Margaret Heffernan: Dare to disagree
12:56 Posted: Aug 2012
Views: 938,038 | Comments: 355
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Play
Salman Khan: Let's use video to reinvent education
20:27 Posted: Mar 2011
Views: 2,571,246 | Comments: 443
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Chimamanda Adichie: The danger of a single story
18:49 Posted: Oct 2009
Views: 4,257,397 | Comments: 774