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http://www.sciencenews.org/view/issue/id/4811
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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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March 13th, 2004
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Scientists may have come up with a new explanation for how a woman's biological clock works. (p. 163)
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A new analysis of brains from a variety of mammal species indicates that frontal-cortex expansion has occurred in all primates, not just in people, as scientists have traditionally assumed. (p. 163)
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Astronomers unveiled the deepest visible-light portrait of the universe ever taken, a million-second-long exposure by the Hubble Space Telescope that includes near-infrared images of what appear to be the most-distant galaxies known. (p. 164)
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By shutting down a signaling molecule on cancerous cells, scientists have found a way to slow multiple myeloma and fibrosarcoma, tests in animals show. (p. 164)
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Researchers have created a fuel cell that breaks down organic matter in wastewater and, in the process, generates small amounts of electricity. (p. 165)
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Nutrition research supports the ancient notion that a diet rich in meat contributes to the development of gout, a form of arthritis common in men. (p. 165)
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Scientists have genetically engineered a butterfly for the first time, putting a jellyfish protein into a tropical African species so that its eyes fluoresce green. (p. 166)
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The controversial strategy of screening embryos to produce donors for siblings raises hopes and presents new ethical dilemmas. (p. 168)
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President Bush recently unveiled an ambitious plan for a manned mission to Mars, using the moon as a testing area and stepping-stone, but for many planetary scientists the moon is a desirable destination in and of itself. (p. 170)
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Needing tiny radioactive sources to calibrate medical scanners with ever-sharper vision, an Australian team dipped tiny balls the size of candy sprinkles into a radioactive liquid. (p. 173)
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Irradiating bundles of carbon nanotubes can lead to tougher fibers. (p. 173)
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Newly discovered strains of bacteria have developed a metabolic shortcut for eating away iron with great efficiency. (p. 173)
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Oceanographic data gathered across the North Pacific in 1985 and again in 1999 indicate that the deepest waters there have been heating up. (p. 173)
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Contrary to much anthropological thought, the genus Paranthropus showed as much dietary and behavioral flexibility as ancient Homo species did between 3 million and 1 million years ago. (p. 174)
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The magnetic characteristics of rocks and debris excavated from Pompeii reveal the changing temperatures of the volcanic ash cloud that smothered the Italian city in A.D. 79. (p. 174)
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Two anti-inflammatory drugs for rheumatoid arthritis—methotrexate and etanercept—work better together than either does individually. (p. 174)
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Recurring exposure to soot particles from diesel exhaust fumes reduces the immune system's capacity to fend off infection, tests on rodents indicate. (p. 174)
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(p. 175)
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