Feynman lesson: http://pic.twitter.com/EvseljLP2B
— Richard Feynman (@ProfFeynman) February 13, 2017
via Twitter https://twitter.com/ProfFeynman
February 13, 2017 at 12:08PM
Feynman lesson: http://pic.twitter.com/EvseljLP2B
— Richard Feynman (@ProfFeynman) February 13, 2017
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