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http://www.sciencenews.org/view/issue/id/4881
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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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April 3rd, 2004
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Although nanomaterials could one day lead to more powerful electronics and better medicines, new research shows these tiny materials can also be toxic to fish. (p. 211)
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Scientists announced that they have deciphered the full DNA sequence of the standard lab rat, setting the stage for a new flurry of biomedical research on this rodent and providing insight into mammalian evolution. (p. 211)
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A hunting bird's quirk—a tendency to impale prey on thorns—leaves a record that has allowed scientists to catch a glimpse of an evolutionary force in action. (p. 212)
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Circumcision seems to offer partial protection against HIV infection, but not other sexually transmitted diseases. (p. 212)
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A new survey is adding to the evidence that Andromeda, the Milky Way’s sister galaxy, has not only grown bigger in the past by feasting on smaller galaxies but is continuing to do so. (p. 213)
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For the first time, an airplane flew at hypersonic speed under power of a scramjet, an engine that operates at high velocities using oxygen from the atmosphere. (p. 213)
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Analyses of genetic material from a multitude of fern species suggest that much of that plant group branched out millions of years after flowering plants first appeared, a notion that contradicts many scientists' views of plant evolution. (p. 214)
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Genetic mutations that predispose some people to the autoimmune diseases lupus, psoriasis, and rheumatoid arthritis appear to have a common molecular feature: They derail the work of a protein, called RUNX1, that regulates how active certain genes are. (p. 216)
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They're pugnacious and clever, and they have complex social lives—but do capuchin monkeys actually exhibit cultural behaviors? (p. 218)
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Bacteria dwelling in an abandoned iron mine form unusual crystals that could help scientists look for signs of previous life on Mars. (p. 221)
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Use of an ingestible prescription drug may explain the highest blood concentration of a chemical plasticizer ever observed. (p. 221)
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The United Nations enacted a new treaty to ban exportation of any of a list of toxic chemicals without the prior informed consent of an importing nation. (p. 221)
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Thoughts that are consciously suppressed during the day often pop up in dreams, regardless of whether they involve emotionally charged desires, a new study suggests. (p. 221)
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Powdered mummies, one of medieval Europe's most popular concoctions for treating disease, might instead have been an agent of widespread germ transmission, new research suggests. (p. 222)
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Researchers have developed a way to use laser-based surveying equipment to quickly and easily create detailed images of ancient rock art. (p. 222)
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Scientists may have come up with a way to use satellite images taken at night to estimate the rate of population growth in fire-prone areas and thereby better assess fire risk to specific groups of residents. (p. 222)
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(p. 223)
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