It was the greatest experiment ever conducted on U.S. soil. Discover 20 little-known facts about the Manhattan project.

So it's an indication of the importance Stalin gave to the Soviet atomic bomb program that he appointed Beria to head it on August 7, 1945, the day after the U.S. dropped an atomic bomb on Hiroshima.

But within months he was handing over classified information on the progress of Britain’s atomic bomb research to Soviet ...

According to several of the sources, German forces placed many concentration camp prisoners at the test site as human guinea ...

One of the most important projects of the 20th century was also one of the most daring and destructive, and it reshaped the ...

Even before the Soviet Union tested its first atomic weapon in 1949, American security officials began secret studies of the threat from a smuggled bomb. This early assessment by the Central ...

The Soviet Union occupied Korean territory north ... marked the last use of an atomic bomb in combat. Carrier-based U.S. Navy aircraft tear up a bridge over the Yalu River. The war ended where ...

AI researcher Dan Hendrycks and former Google CEO Eric Schmidt stress the dangers posed by superintelligent AI.