China’s ongoing nuclear breakout extends beyond the size of its arsenal. Beijing is building the fusion facilities and ...

Add Yahoo as a preferred source to see more of our stories on Google. This undated photograph shows American seismologist Dr. Youlin Chen. - Chen family/Handout/Global Reach An American scientist who ...

WASHINGTON, March 24 (Reuters) - A senior State Department official on Tuesday said the U.S. still is assessing how to implement President Donald Trump's order to ‌resume U.S. nuclear weapons tests, ...

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 State Department’s allegation that China conducted a yield-producing nuclear test in 2020 is reigniting debate in Washington over whether the United States can continue its decades-long moratorium ...

Nuclear technology company Oklo has announced its Groves Isotope Test Reactor has achieved first criticality, while Deep Fission's underground reactor has received safety design approval. Both ...

In the five days since the last remaining nuclear treaty between the United States and Russia expired, statements by administration officials have made two things clear: Washington is actively ...

California-based Deep Fission said the DOE signed off on the Nuclear Safety Design Agreement (NSDA) for its Gravity Nuclear ...

Beijing (CNN) — An American scientist who has studied underground nuclear tests has been detained in China for more than 18 months on spying charges, according to his supporters and a US lawmaker.