History: The only known photo of Einstein deriving the theory of relativity equation at a conference at the University of Pittsburgh (1934) [1200 x 703]

https://i.redd.it/jsn5mz5xue461.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/kam3jk/the_only_known_photo_of_einstein_deriving_the/?utm_source=ifttt