Physicists propose that high-energy photon jets from collapsing stars may be secret factories of heavy elements like plutonium, challenging traditional theories and possibly explaining strange cosmic ...

Beginning in the late 1950s, the U.S. met this challenge by developing nuclear batteries known as radioisotope thermoelectric generators (RTGs) and producing plutonium-238 (Pu-238) as their fuel, ...

Oak Ridge estimated it would take four to six months from start of construction to production of the first plutonium metal, and that the plant could produce five kilograms of plutonium — a bomb ...

But Miller’s alleged possession of highly radioactive plutonium did not capture the attention of federal agents at high levels, according to court records. A federal investigator told local ...

A Hadley man has been indicted by a federal grand jury in Springfield for allegedly possessing ammunition and explosives despite previously being convicted of a felony, prosecutors said.

As India is home to the world’s largest reserves of thorium, its long-term nuclear power strategy culminates in exploiting this silvery, slightly radioactive metal, which is considered cleaner and ...