Einstein Letter With 'E=mc2' Equation Sells for Over a Mil at Auction

A handwritten letter featuring Albert Einstein's famous theory of special relativity has sold for a bundle at auction -- fetching a 7-figure amount!!! The one-page note was written by Einstein in 1946, and sent to fellow physicist Ludwik…

source https://www.tmz.com/2021/05/22/einstein-letter-with-handwritten-e-mc/