84 years ago, Einstein wrote an urgent letter that altered history forever

While Einstein didn’t work directly on the Manhattan Project, he was responsible for its inception.

On August 2, 1939, German physicist Albert Einstein penned a letter to President Franklin D. Roosevelt. It was one month before Germany invaded Poland, and two years before the attack on Pearl Harbor.

This letter, mentioned in the newly released Christopher Nolan movie Oppenheimer, set off its own chain reaction that resulted in the Manhattan Project, which began in August 1942 and ended three years later with the devastating atomic bomb drops. FULL STORY from Inverse