Half Of Earth's Heat Is Radioactive


ENVIRONMENT
Half Of Earth's Heat Is Radioactive[newscientist.com]Jul 19, 2011
 
    Researchers using an antennae buried in Japan discovered that measurements of antineutrinos suggest about half of Earth's heat comes from the radioactive decay of uranium and thorium. The uncertainty is so small that it's also suggested that some of that decay occurs in the mantle, not just the core.
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