Favorite talks
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Play
Richard Feynman: Physics is fun to imagine
65:55 Posted: Mar 2010
Views: 434,959 | Comments: 134
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Play
Sean Carroll on the arrow of time (Part 1)
28:57 Posted: Feb 2010
Views: 290,810 | Comments: 151
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Brian Greene: Making sense of string theory
19:06 Posted: Apr 2008
Views: 1,878,665 | Comments: 446