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 ...

Few names are as closely linked with the atomic bomb as Albert Einstein's. Mention nuclear weapons and, sooner or later, ...

Confusion on whether Iran truly needed only “two weeks to four weeks” to make a nuclear weapon, as President Donald Trump suggested on Monday, hangs over the ongoing U.S. and Israeli war on the ...

Iran cannot use 60% enriched uranium directly in its current form (UF₆, which is stored as a solid in cylinders but handled as a gas or liquid during processing) to build a gun-type nuclear bomb. It ...