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The Winter 2010 issue of The Earth Scientist includes a variety of educational resources, ranging from astronomy to glaciers. Check out the other publications and classroom materials in our online store.
On average, people in the U.S.A. are exposed to about 3.6 milliSieverts of radiation each year.
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Windows to the Universe original artwork using data from the National Council on Radiation Protection and Measurements.

Radiation

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Last modified October 27, 2006 by Randy Russell.

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Radioactive Decay

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF