Favorite talks
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Alexander Tsiaras: Conception to birth -- visualized
09:37 Posted: Nov 2011
Views: 2,297,289 | Comments: 447
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Shaffi Mather: A new way to fight corruption
10:41 Posted: Dec 2009
Views: 290,034 | Comments: 131
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Michael Pritchard: How to make filthy water drinkable
09:31 Posted: Aug 2009
Views: 1,547,994 | Comments: 639
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Kamal Meattle: How to grow fresh air
04:04 Posted: Mar 2009
Views: 1,488,085 | Comments: 155
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Woody Norris: Hypersonic sound and other inventions
13:49 Posted: Jan 2009
Views: 963,196 | Comments: 134