- Only two similar examples of world-changing equation known
- 1946 letter to physicist Ludwik Silberstein auctioned
Related: Albert Einstein’s ‘God letter’ reflecting on religion auctioned for $3m
A handwritten letter by Albert Einstein that contains his famous E=mc2 equation has sold at auction for more than $1.2m, about three times more than it was expected to get, a Boston-based auction house said on Friday.
