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http://www.sciencenews.org/view/access/id/49014
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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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Cosmic rays traced to centers of star birth. Researchers have detected gamma rays from the galaxy M82 (a false-color image shows a very-high-energy gamma-ray emission). The gamma rays are evidence that regions of star formation (shown here as a black star) in galaxies such as M82 are sources of cosmic rays with energies of up to quadrillions of electron volts.Credit: V.A. Acciari/CFA
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