23 Enero 2013
Aprende física con uno de los mejores profesores del mundo. ¡gratis! #educación http://t.co/3AuBCKRQ
January 23, 2013
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New Course from legendary MIT physics professor Walter Lewin
If you could learn #physics from one of the world's greatest professors for free, would you? Have some fun with +Massachusetts Institute of Technology...
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