The Rulison test — conducted at a depth of 8,425 feet — was the deepest subterranean nuclear-bomb detonation conducted in U.S. history.

The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing are unraveling.

In 1958, as Cold War tensions shaped decisions in Washington and Moscow, a study quietly examined whether a nuclear device ...

Asteroid 2024 YR4, discovered last year, continues to capture the interest of astronomers. Initially, the probability of it hitting our planet was estimated at 3%, a figure which later dropped to 1.2% ...