The speed of light is almost 300 million meters per second, but someone only needed $1.2 million for this letter. A handwritten letter by Albert Einstein that included his famous equation E=mc2 sold ...

BOSTON — A letter handwritten by Albert Einstein in which he writes out his famous E = mc2 equation has sold at auction for more than $1.2 million on Friday, about three times more than it was ...

Over 100 years ago, Albert Einstein grappled with the implications of his revolutionary special theory of relativity and came to a startling conclusion: mass and energy are one, related by the formula ...

A handwritten letter from theoretical physicist Albert Einstein featuring his famous E = mc2 equation has sold for over $1.2 million at an auction. Boston-based auction house RR Auction revealed on ...