San Francisco officials say they weren’t told that the Navy detected plutonium at the Hunters Point Shipyard for 11 months.

The leak is by a children's playground and is claimed to have been discovered by the US Navy almost an entire year before it was announced.

Last year, scientists announced they'd found a rare type of plutonium at the bottom of the Pacific Ocean. This plutonium is believed to have come from an exploding star. NPR's Nell Greenfieldboyce ...

Production of plutonium pits at the Savannah River Site and Los Alamos National Laboratory remains a top priority of the U.S. Department of Defense and the National Nuclear Security Administration.

A map of the areas sampled by analytical chemist Michael Ketterer who released his findings of legacy plutonium waste in Los Alamos' Acid Canyon. (Courtesy of Michael Ketterer) Los Alamos, the Atomic ...

The lab where Oppenheimer developed the atomic bomb is the linchpin in the United States’ effort to modernize its nuclear ...

As the fuels of the space and atom age get more powerful, they also get harder to handle. Last week General Bernard Schriever, new chief of the Air Forces Research and Development Command, announced ...

Russia formally ends a landmark plutonium disposal pact with the United States while showcasing a nuclear-powered missile ...

Traces of rare forms of iron and plutonium have been found at the bottom of the Pacific Ocean, after some kind of cataclysm in outer space created this radioactive stuff and sent it raining down on ...

Common chemical elements are created in stars like our sun. But heavy elements, like iron, are thought to form in massive stars that explode and spew material — though it might be more complicated.

Something went boom in outer space and sent radioactive stardust our way, and it's just been found at the bottom of the ocean. Traces of rare forms of iron and plutonium have been found at the bottom ...