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In the December 5 Issue:
- TABLE OF CONTENTS
- Climate might be right for a deal: Copenhagen negotiations will take steps toward a climate-stabilizing treaty
- Botanical Whales: Adventures in the Tortugas reveal that seagrass fields need saving too
- Breaking the Speed Limit: Studies examine physiology and technology to better foresee the ultimate edge of human performance
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Arctic sea ice extent
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Arctic sea ice hit an all-time low in September 2007. The magenta line indicates the average September ice cover from 1979 to 2000.
Credit: National Snow and Ice Data Center, Boulder, CO
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