The U.S. hasn't tested a nuclear weapon in decades, and since the 1990s has used simulations and experiments to verify they're working properly. NPR was granted a rare look at how they do it.

A thousand feet beneath the desert, the United States conducts experiments to verify that its weapons work. But some fear a ...

In a major development, satellite imagery analysis has revealed that China is developing a laser fusion research facility in ...

The number of Chinese operational nuclear warheads has increased by more than 100 to over 600, the Pentagon reported.

Satellite images suggest China is building a massive fusion research facility, larger than its US counterpart, potentially serving both clean energy research and nuclear weapons development.

China appears to be building a large laser-ignited fusion research centre in the southwestern city of Mianyang, experts at ...

Authorities said Thursday they have found "no definitive link" between the New Orleans attack on New Year's Day and the explosion in a Tesla Cybertruck outside a Trump hotel in Las Vegas.

The recent launch of the Chinese Long March 3B rocket, which involved sending the TJS-14 satellite into space, proceeded ...

Scientists have succeeded in maintaining an "artificial sun" here on Earth for a whopping 17 minutes and 46 seconds.