North Korea warned this week that it might test a hydrogen bomb in the Pacific Ocean, after saying the country had already ...

In 1994, astronomers witnessed one of the most dramatic events ever recorded in space when comet Shoemaker–Levy 9 smashed ...

While it may sound like a bombastic action movie, many genuinely fear a potential nuclear war. Here's a possible Georgia ...

Key Points and Summary - The U.S. military has suffered dozens of “Broken Arrow” nuclear weapons accidents—events involving lost weapons, accidental releases, or other serious mishaps. -Most were ...

NPR's Leila Fadel asks Iran expert Ali Vaez of the International Crisis Group about Iran's nuclear capabilities before and after U.S. and Israeli attacks.