Russia tested a new long-range missile capable of carrying nuclear warheads, months after the last treaty with the U.S.

A magnitude 4.1 earthquake in southern Iran has reignited online speculation that Tehran may be conducting underground nuclear weapons tests, with some commentators drawing a direct line between the ...

Nuclear weapons tests are among the most violent events humans can trigger, and that violence leaves fingerprints in the Earth, sea, air, and even in orbit. The physics of shock waves, sound, and ...