North Korean leader Kim Jong Un welcomes Chinese President Xi Jinping to Pyongyang on Monday, feeling in a position ​of strength with a firm ally in Russia, a nuclear arsenal and little apparent ...

The nuclear plant's disclosure implies that leader Kim Jong Un is eager to cement his country's status as a nuclear power.

Scientists at Lawrence Livermore National Laboratory recreated part of the intense chaos inside a nuclear fireball to better ...

The world nuclear order exists only in the minds of those who postulate it. The history of nuclear power over the last 80 ...

Melissa Casias has been missing for nearly a year. A hiker reported finding her remains at the the Carson National Forest in ...

Explore the U.S. nuclear triad, the three-layer deterrence system built around missiles, submarines and strategic bombers.

President Trump is confronting a challenge with Iran’s nuclear program that is partly of his own making: a mountain of highly enriched uranium that Tehran has refused to hand over despite two months ...

Rachel Feltman: For Scientific American’s Science Quickly, I’m Rachel Feltman. Last August U.S. Secretary of Transportation Sean Duffy, who at the time was also the acting administrator of NASA, ...

While the U.S. Department of Agriculture's Animal and Plant Health Inspection Service and the Bureau of Land Management had not approved new uses of M-44 devices on public lands as of this writing, an ...

Nuclear power plants are safer than many suspect. But putting reactors in space is a concept with a checkered history. One notorious reactor caused an international incident in 1978 after it came ...

The dawn of nuclear weapons forced militaries to rethink everything and the U.S. Marines faced a terrifying reality. This video explores how atomic warfare threatened traditional amphibious assaults ...