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Nature 436, 467-468 (28 July 2005) | doi:10.1038/436467a; Published online 27 July 2005

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Earth sciences:  Ghosts from within

William F. McDonough1

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The first detection of geoneutrinos from beneath our feet is a landmark result. It will allow better estimation of the abundances and distributions of radioactive elements in the Earth, and of the Earth's overall heat budget.

The decay of unstable isotopes of chemical elements within the Earth produces heat that contributes to its overall energy output — a fact recognized shortly after Henri Becquerel first discovered radioactivity in 1896. More than 100 years on, Araki et al.page 499 of this issue)1 report the first measurement of antineutrinos produced by radioactive beta--decay at the heart of the Earth.

  1. William F. McDonough is in the Department of Geology, University of Maryland, College Park, Maryland 20742, USA.
    Email: mcdonoug@geol.umd.edu

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