On August 10, 1945, a handwritten note on a major wartime document placed an additional restriction on the atomic age, which was: “It is not to be released over Japan without express authority from ...

What does get different in a tale everybody thinks they already know when the lost chapter is a weapon that is already on its way? When the first two bombs of the Manhattan Project had accomplished ...

The Manhattan Project that built the atomic bomb wasn't without its own dangers. Experiments on a so-called "demon core" of plutonium caused the deaths of two Manhattan Project physicists. Both ...

Add Yahoo as a preferred source to see more of our stories on Google. Atomic bombs work via a process called nuclear fission that involves atom splitting. Shortly after scientists discovered nuclear ...

ALBUQUERQUE, N.M. (AP) — The federal agency that oversees the nation's nuclear weapons stockpile recommended Thursday that the production of the plutonium cores that trigger nuclear warheads be split ...

Email notifications are only sent once a day, and only if there are new matching items. Los Alamos National Laboratory reached what federal officials say is a key milestone in developing its first ...

Today in jeepers: There's a speck of weapons-grade plutonium missing in Idaho. According to a Nuclear Regulatory Commission (NRC) statement, 1 gram (0.04 ounces) of plutonium-239 — about the weight of ...

Japan's Monju fast breeder reactor should return to service this year, with fresh plutonium fuel replacing its initial core load. Japan's Monju fast breeder reactor should return to service this year, ...