Add Yahoo as a preferred source to see more of our stories on Google. No country other than North Korea is known to have conducted a nuclear detonation for decades (File: EPA-EFE/KCNA) China has ...

How atomic fallout created demand for pre-1945 'low-background' steel in scientific instruments.

President Donald Trump's order late Wednesday night for the U.S. to resume nuclear weapons tests has confounded officials and drawn scrutiny from nuclear experts over the safety, feasibility and ...

President Donald Trump ordered the Department of War to resume testing nuclear weapons “on an equal basis” with Russia and China on Thursday, a practice halted by the U.S. in 1992. The announcement ...

VIENNA(AP) — The United States and Russia have both recently threatened to resume nuclear testing, alarming the international community and jeopardizing a global norm against such tests. Experts say ...

China's Foreign Ministry responded on Monday to President Trump's assertion that Beijing has conducted clandestine nuclear weapons testing with a flat denial. "China's testing 'em too," Mr. Trump told ...

Senior Russian officials on Nov. 11 said they were still waiting for a White House explanation about what President Donald Trump meant he when said he had instructed the Pentagon to resume nuclear ...

The president's announcement that the U.S. would resume tests leaves questions. President Donald Trump raised questions Wednesday night about a decades-old U.S. prohibition on testing its nuclear ...

President Trump's comments about restarting weapons tests are not likely to lead to mushroom-cloud explosions over the New Mexico desert or seismic shaking underground in Nevada, according to the ...