The plutonium-244 hints at how heavy metals form in stars. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A rare version of the ...

A soil sample with an elevated level of plutonium taken along the eastern edge of Rocky Flats National Wildlife Refuge is more than five times the cleanup standard established for the radioactive ...

JEFFERSON COUNTY, Colorado — A soil sample taken near Rocky Flats has tested for an elevated level of plutonium five times higher than cleanup standard set to protect public health. The Colorado ...

Rocky Flats manufactured plutonium triggers for nuclear warheads and had a history of fires, leaks and spills. For the first time in 13 years, the soil in and around the former nuclear weapons ...

Expose a silvery piece of plutonium to air and it tarnishes, developing a patina that looks yellow or green, depending on the sample. For many years, scientists thought that this unpredictable ...

Radioactive metal from nearby supernova is raining down on Earth — but we’ll be fine We get hit by about one nucleus a year by Loren Grush Source Science Apr 21, 2016, 11:00 AM PDT Kimberly Mas ...

American Chemical Society. "Historic Sample Of Bomb-grade Plutonium Discovered." ScienceDaily. ScienceDaily, 5 March 2009. <www.sciencedaily.com / releases / 2009 / 03 / 090302130224.htm>.

A soil sample taken along the eastern edge of Rocky Flats National Wildlife Refuge near Indiana Street has turned up an “elevated” level of plutonium in the path of a planned four-lane … ...

Boston Chemical Data Corp., a private environmental engineering firm in Massachusetts, analyzed the sample and detected plutonium 239 with 95 percent certainty.

DOE/Oak Ridge National Laboratory. "Milestone achieved with plutonium-238 sample." ScienceDaily. ScienceDaily, 22 December 2015. <www.sciencedaily.com / releases / 2015 / 12 / 151222163404.htm>.

The new research finds that the isotope, called plutonium-244, may arrive on Earth in tandem with iron-60, a lighter metal known to form in supernovas, explosions that occur during the death ...