This is the video that image was taken from: http://www.youtube.com/watch?v=u6XA... | Hacker News

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dydreamer12 on Sept 26, 2012 | parent | context | favorite | on: The science behind what motivates us to get up for...

This is the video that image was taken from: http://www.youtube.com/watch?v=u6XAPnuFjJc

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