A senior official from the State Department presented new seismic data to bolster the accusation that Beijing may have ...

The U.S. government revealed new intelligence on Tuesday suggesting China may have conducted an illicit nuclear test back on ...

Washington claims new seismic data indicate an underground explosion, while Beijing denies any nuclear activity.

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald Trump vows to restart U.S. tests.

At a event in Washington D.C., A U.S. official said a remote earthquake in 2020 was caused by a Chinese nuclear test.

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

The United States is ready to carry out low-yield nuclear tests to match alleged secret explosions by China and Russia, ...

A nuclear engineer examines how visual effects artists interpret the size and power of nuclear explosions. The reaction ...

ALBUQUERQUE, N.M. — Transported in the backseat of a blacked-out Plymouth sedan was the culmination of years of feverish work — a hefty plutonium core that would soon be used to trigger the world’s ...

C ould nuclear bombs be harnessed to help people? As the Cold War raged on in the 1950s, scientists building nuclear weapons began to ponder whether they could be put toward posit ...

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