A grapefruit-sized sphere of plutonium holds enough energy to wipe a city off the map. But how does that actually work? From chain reactions to hydrogen bombs, we’re breaking down the terrifying ...

Edward Teller (Jan. 15, 1908 - Sept. 9, 2003) was a Hungarian-American trained in theoretical physics. He is well-known as “the father of the hydrogen bomb.” Work on the hydrogen bomb by Teller ...

North Korea said Sunday it had tested a hydrogen bomb which it can mount on a missile, declaring "perfect success" in its biggest-ever nuclear detonation. Pyongyang has long sought the means to ...