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Tag: “half-life”

Nearby Supernovae Showered Earth and Moon With Radioactive Iron

April 15, 2016

Artist Animation of Star Explosion (NASA/JPL/Australian National University) Two new studies suggest radioactive bits of a nearby star or stars that exploded into a supernova or supernovae showered the Earth and Moon with radioactive iron a couple of million years ago. Both studies found the stellar evidence in concentrations of an isotope of iron called […]

New Dating System Could Reveal Secrets of Earth’s Ancient Climate

April 21, 2014

Scientists have a new tool in the quest to learn more about Earth’s ancient climate, including the mechanisms that plunged our planet into and out of ice ages. The new tool is a scientific technique called radiometric krypton dating, which recently allowed researchers to accurately determine the age of a 120,000-year-old Antarctic ice core sample. […]

Scientists Say They’ve Confirmed Existence of New Chemical Element

August 28, 2013

Students heading back to school for the new year might need to add a new element to their periodic table of elements in chemistry class. Swedish scientists  say they have fresh evidence that confirms the existence of a previously unknown chemical element. The new “super-heavy” element is listed as number 115 or Ununpentium (Uup) and […]

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