The U.S. hasn’t detonated a nuclear weapon since 1992. Now a fusion start-up whose co-founders include former national lab ...

Add Yahoo as a preferred source to see more of our stories on Google. Robert Pape (Jacquelyn Martin/AP) Iran could be preparing a dramatic "October surprise" involving its nuclear program just weeks ...

Iran’s hardliners are now openly calling for nuclear weapons, with a senior lawmaker urging Tehran to build a bomb and ...

Eventually, they concluded it was Gilju County, an area in North Korea's northernmost province. What Seoul's equipment was ...

North Korea’s interest in nuclear weapons was decades in the making—but its first earnest attempt during the 1990s was ...

Learn why thousands of soldiers were deliberately exposed to radiation from a nuclear bomb in the Soviet Union, and why other nations did the same.

UNITED NATIONS — With the U.S., Russia, China and other countries that have nuclear weapons refusing to ratify the treaty that bans atomic testing, the United Nations warned on Monday that any new ...

Head of Organization Overseeing Nuclear Test Ban Treaty Issues Warning to US and Russia UNITED NATIONS (AP) — The head of the organization overseeing a treaty banning nuclear testing warned Wednesday ...

TOKYO / ASTANA, August 31 (IPS) - Across the vast steppe of northeastern Kazakhstan, the scars of the Cold War remain visible. At the Semipalatinsk Nuclear Test Site, the Soviet Union conducted 456 ...