Most materials expand when heated. This happens because the rising temperature causes atoms to vibrate intensely, move further apart, and occupy more space. Delta-plutonium, however, breaks this ...

Add Yahoo as a preferred source to see more of our stories on Google. A plan to dilute and dispose of excess plutonium dating back to the Cold War was frozen by an executive order President Donald ...

Public health advocates say the US Navy knew for almost a year that tests had detected dangerous levels of plutonium in the air at San Francisco’s Hunters Point Naval Shipyard. The Navy discovered the ...

At a Board of Supervisors hearing on Monday, representatives from the U.S. Navy reassured San Francisco city officials that the discovery of radioactive contaminants at the Hunters Point Naval ...

Plutonium (Pu) exhibits one of the most diverse and complex chemistries of any element in the periodic table. Since its discovery in 1940, scientists have synthesized and studied many different types ...

The Trump Administration is proposing to make 20 metric tons of plutonium from dismantled nuclear warheads available to U.S. power firms for use in advanced nuclear reactors. This plan follows an ...

Lawrence Livermore National Laboratory scientists have trapped a single plutonium atom inside a tiny molecular cage, using only six micrograms of the radioactive metal. The work turns an element ...