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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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Shrinking sheep
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Wild Soay sheep on the islands of the St. Kilda archipelago in the North Atlantic have been measured and monitored by scientists for decades. All this data now explains why females have been slowly getting smaller with generations.
Credit: Arpat Ozgul
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