Jay Cowan still worries about the Rulison blast’s proximity to the Colorado River and expresses disbelief at the 107 days that radioactive gas was burned in order to test whether the radionuclides ...

In 1958, as Cold War tensions shaped decisions in Washington and Moscow, a study quietly examined whether a nuclear device could be exploded on the Mo.

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 ...

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

Out of this surreal convergence of spectacle and science emerged one of the most striking and unsettling cultural icons of ...

It remains to be seen whether the three big nuclear powers are headed into a new arms race, or whether President Trump is trying to spur negotiations on a new accord now that a last Cold War treaty ...

The New START treaty, versions of which have kept the world safe from nuclear catastrophe for generations, expired last Thursday. In the lead-up, the Russian president casually suggested the ...

Beijing has been accused of conducting secret nuclear explosion tests and attempting to disguise its violation of a global prohibition treaty.

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 ...

Canada’s former top soldier says we need to consider developing nuclear weapons in the name of strategic independence. But that will have massive costs ...

A BOMBSHELL ACCUSATION: When President Donald Trump announced last October that he was ordering the Pentagon to “immediately” start testing nuclear weapons on an equal basis,” with “other countries” ...