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Hands On Mineral Identification helps you to identify over 14,500 minerals! By M. Darby Dyar, Ph.D. See our DVD collection.
Thawing permafrost causes large blocks of tundra to slump into the Arctic Ocean.
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Image courtesy of the USGS

Permafrost

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Last modified May 2, 2011 by Jennifer Bergman.

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The Fall 2009 issue of The Earth Scientist, which includes articles on student research into building design for earthquakes and a classroom lab on the composition of the Earthís ancient atmosphere, is available in our online store.

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