Iran and the United States are waging gunboat diplomacy as talks over Tehran’s nuclear program hang in the balance.

In the late 1950s, the US Air Force quietly assembled top scientists, including a young Carl Sagan, to study a nuclear detonation on the Moon as a Cold War show of strength. The plan never happened, ...

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

Right now, there are over 400 nuclear power plants operating in 20 countries. Could they be ticking time bombs? Possibly ...

The meeting Tuesday occurred against the backdrop of an expanded U.S. military presence in the Middle East, as President Donald Trump threatens to attack Iran if a deal cannot be reached.

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

Iran announced the temporary closure of the Strait of Hormuz on Tuesday for live fire drills in a rare show of force as its negotiators held another round of indirect talks with the United States over ...

China is on course to have more than 1,000 nuclear warheads in the next few years, according to U.S. intelligence estimates.

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

A top arms diplomat at the State Department recently laid out what might come next as Washington upends decades of federal policies on nuclear proliferation.

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