In 1954, the United States detonated Castle Bravo at Bikini Atoll expecting a far smaller blast, but the weapon exploded with a 15-megaton yield and became the largest nuclear test in U.S. history.

There has not been a major (or minor) nuclear explosion since the 1960s. This is almost entirely because the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) was opened fo ...

A Cold War-era map from a 1986 study shows the devastating potential death toll if nuclear bombs were dropped on the United ...

As Russia begins testing its warning sirens in preparation for a possible war of nations, questions have been raised as to how Britain would fare when faced with the full arsenal of the Russian bear.

A chilling map shows the areas of the United States that would be worst affected by a nuclear conflict, with up to 75% of people in the hardest-hit regions predicted to die ...

The editorial board is a group of opinion journalists whose views are informed by expertise, research, debate and certain longstanding values. It is separate from the newsroom. The world is entering a ...

A special set of numbers has formed the backbone of nuclear physics research for decades, and now we finally know how it arises from the quantum mix of nuclear particles and forces. Nearly 80 years ...

Lockheed Martin's concept for a fission surface power (FSP) system on the surface of the moon. Credit: Lockheed Martin No technology holds more transformative potential for America’s space aspirations ...

The Department of War on Sunday transported a next-generation nuclear reactor aboard a C-17 from California to Utah, advancing President Donald Trump’s executive order to modernize America’s nuclear ...

More than 100 people witnessed a fireball shooting through the sky late Tuesday night in at least five different states in the Central U.S. Videos from Indiana and Ohio showed the white-green ball ...

Add Yahoo as a preferred source to see more of our stories on Google. More than 100 people witnessed a fireball shooting through the sky late Tuesday night in at least five different states in the ...

In January 2025, WSJ went inside Three Mile Island to learn more about the delicate process of rebooting a nuclear power plant. Photo Illustration: Alexandra Larkin A nuclear-power startup said it has ...