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 Spring 2010 issue of The Earth Scientist, focuses on the ocean, including articles on polar research, coral reefs, ocean acidification, and climate. Includes a gorgeous full color poster!

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