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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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November 26th, 2005
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Starting with bits of skin, scientists have produced new blood vessels in a laboratory and successfully implanted them into two patients. (p. 339)
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Specialists in atomic-scale construction can now use a new molecule to gather small groups of atoms and drop them, as clusters, at specific locations. (p. 339)
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Field tests in the Amazon have for the first time measured daily and seasonal movements of soil moisture through the deep roots of trees. (p. 340)
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Researchers have found a new kind of traffic sign on ant trails, a chemical "Do not enter" that keeps foragers from wasting their time on paths that don't lead to food. (p. 340)
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A new federal study strongly suggests that all U.S. residents harbor measurable traces of fluorochemicals, compounds found in a host of consumer products. (p. 341)
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By removing one gene from a mouse's standard repertoire, scientists have turned a timid animal into an intrepid one. (p. 341)
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A gene that exerts wide-ranging effects on the brain works harder in people than it does in chimpanzees and other nonhuman primates. (p. 342)
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The Hubble Space Telescope has captured the largest number ever of elliptical galaxies with Einstein rings, a marker of gravitational lensing. (p. 342)
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Amid a growing array of medications for treating insomnia, sleep researchers point to large gaps in their knowledge about which of these medicines work best and for how long they remain effective. (p. 344)
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Scientists are working to overcome the biomedical challenges that would hinder a human voyage to Mars. (p. 346)
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A faint, infrared glow captured by the Spitzer Space Telescope might be light from the universe's first stars. (p. 349)
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The nighttime breathing disorder called obstructive sleep apnea might double a person's risk of death or stroke. (p. 349)
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Astronomers who previously announced that they had identified the likely remains of the Mars Polar Lander in images taken by an orbiting spacecraft now say that they were fooled by electronic noise in those images. (p. 349)
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Antibiotics shed by livestock in manure can end up in crops or bound to soil, where they can foster disease-resistant germs. (p. 349)
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Extracting cells from a heart attack patient's bone marrow and then inserting them into the person's heart via a catheter can improve pumping capacity. (p. 350)
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The experimental drug levosimendin, in combination with standard drugs, eases heart failure symptoms better than standard drugs alone do. (p. 350)
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Former professional bicyclers have signs of heart problems nearly 4 decades after competing in grueling endurance events. (p. 350)
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An experimental drug called varenicline helps cigarette smokers kick the habit better than bupropion does, the most effective medicine currently on the market. (p. 350)
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A cognitive neuroscientist describes how the brain has adapted to reading and what can cause reading...
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