US intelligence agencies believe China is developing a “new generation” of nuclear weapons — with Beijing having reportedly ...

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.

A US official says a seismic station in Kazakhstan collected evidence of an alleged China nuclear test at Lop Nur in June 2020.

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

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

Hydrogen bombs cause a bigger explosion, which means the shock waves, blast, heat and radiation all have larger reach than an ...

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

The US accused China of secret nuclear tests, banned under international agreement, that were building toward tests of larger nuclear warheads.

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 ...

Deterring Russia, collecting motherly advice and sending postmortem postcards, through readers’ eyes.

Stony Brook operated under code names such as “Site Item,” and personnel often described their unit in deliberately vague terms. The secrecy was intentional. Even as B-52s roared overhead from ...