in the Coldest Desert
Antarctica's McMurdo Dry Valleys are cold (mean annual temperature is negative 20 degrees Celsius) and dry (annual precipitation is less than 10 centimeters per year). But life exists here nonetheless, and a multidisciplinary team of scientists is working to understand how.
an Arctic Gateway
About 20,000 years ago, sea level in the western Arctic dropped, and the Bering Strait was a land bridge. The history of how sea level has risen and fallen in this area is just one piece in understanding the puzzle of Earths climate.
Julie Brigham-Grette, Lloyd Keigwin and Neal Driscoll
Earths highest latitudes hold clues about the future of the magnetic field, the fate of ice sheets and the history of the solar system.
Polar Research: A Global Endeavor
Scientists from many disciplines and countries are working at the poles to understand drivers of climate change.
Karl A. Erb
48 GEOLOGIC COLUMN
2 From the Editor
4 Letters: Perspectives from readers
28 Where on Earth?
32 Society Page: Profiles of earth scientists in the news
32 In Memoriam: Hugo L. Dummett
37 Energy and Resources: Iron ore
38 Geomedia: The Geothermal Map of California
41 Classified Ads: Career Opportunities
47 Contributors Page
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