After 50 years of searching, physicists have spotted the fingerprint of radioactive plutonium, revealing the secrets of this complex molecule behind nuclear weapons. The researchers found the ...

Opinions differ on whether the half ton of weapons-grade plutonium secretly shipped by the U.S. government to the Nevada National Security Site could impact residents’ health and the environment.

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 ...

After 50 years of searching, physicists have spotted the fingerprint of radioactive plutonium, revealing the secrets of this complex molecule behind nuclear weapons. The researchers found the ...

The fuel rods at all six reactors at the stricken Fukushima Dai-ichi complex contain plutonium — better known as fuel for nuclear weapons. While plutonium is more toxic than uranium, other radioactive ...

Update: Since publication, Jon Schwantes has discovered that a microgram sample of plutonium produced in 1942 by Glen Seaborg’s group at the University of California in Berkeley is also ...

RICHLAND — Nuclear archaeology has solved the mystery of a jug of plutonium that was found sealed inside a safe dug up as workers cleaned up an early Hanford burial ground. Science showed the ...

RICHLAND -- Nuclear archaeology has solved the mystery of a jug of plutonium that was found sealed inside a safe dug up as workers cleaned up an early Hanford burial ground. Science showed the ...

Some outside experts are particularly concerned about high levels of plutonium in one of the damaged Japanese reactors. About 6 percent of the fuel rods in reactor No. 3 at the Fukushima Dai-ichi ...

Back in the 1960s, government scientists thought it was a good idea to make artificial hearts powered by the radioactive element plutonium-238. This isotope of plutonium is the same one that NASA has ...