A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground ...

Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t changed.

Fears of World War 3 and nuclear attacks are on the rise. But how safe would you be in DC, VA and MD during nuclear war? See vulnerable spots.

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 ...

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

Explosions rocked Tehran as the US launched major combat operations against Iran's regime, aimed at eliminating imminent ...

While China is expanding its nuclear arsenal at a dramatic pace, Russia and the U.S. are also testing new delivery platforms.

The United States on Friday accused China of carrying out a secret nuclear test in 2020 as the Trump administration calls for a broader nuclear weapons agreement including both China and Russia. The ...

Add Yahoo as a preferred source to see more of our stories on Google. The end of the New START treaty means Russia and the United States are no longer restricted in the number of nuclear warheads they ...

Iran fired missiles and drones across the Middle East in retaliation for a joint US and Israeli strike that killed the Islamic republic's supreme leader Ayatollah Ali Khamenei. But a video circulating ...

A top Trump administration official on Tuesday disclosed new details to support its claim that China conducted an underground nuclear explosion during Donald Trump’s first presidency, a contested ...