History | History

Recently Declassified Soviet Video Shows the Biggest Nuclear Explosion in History

Tsar Bomba—the biggest hydrogen bomb ever—detonated in October 1961, and the Soviet Union caught it on tape.

News | Interesting Stories

The Future of Plutonium

On November 6, 1944, researchers at the Hanford Site in Washington first created weapons-grade plutonium, the radioactive element used less than a year later in the Fat Man, the atomic plutonium implosion-type bomb dropped on Nagasaki,