1. 

   Kizmet Moderator

   now completely online
   
   The Feynman Lectures on Physics, The Most Popular Physics Book Ever Written, Now Completely Online | Open Culture

    

   Kizmet, Aug 28, 2014

   #1
2. 

   Maniac Craniac Moderator Staff Member

   

    

   Maniac Craniac, Aug 28, 2014

   #2

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