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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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Three different dinosaurs — Dracorex, Stygimoloch and Pachycephalosaurus (clockwise from top left) — might actually be the juvenile, teen and adult of the same dino.Credit: Holly Woodward
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