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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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GALACTIC GROWTH
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This snapshot of a state-of-the-art simulation shows the flow of gas into a fledgling galaxy. Streams of cold gas (blue) flow onto the edge of the fledgling galaxy’s disk, while shock-heated gas (red) surrounds the disk. Gas enriched in metal content (green) by supernova explosions is stripped from smaller galaxies interacting with the hot dark matter halo and the cold gas stream.
Credit: B. Moore, Oscar Agertz and Romain Teyssier/University of Zurich
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