Up for Auction: Einstein Letters Detailing General Relativity and Grand Unified Theory

said braka 1:11 AM
Two letters written by Albert Einstein

detailing his thoughts on some of the most famous theories in physics are going up for auction this week, according to Nate D. Sanders Auctions, which is auctioning off the letters.
Einstein wrote the two letters to his friend and scientific sounding board Michele Besso. One letter outlines Einstein's early thoughts on a grand unified theory, while the other, written much later, is a bit more philosophical, asking what can be known and whether some physical theories can ever be proved.
The bidding for each letter starts at $60,000. Sam Heller, a spokesman for the auction house, said the letters came from a private collection, whose owner didn't want to be identified. [8 Ways You Can See Einstein's Theory of Relativity in Real Life]