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http://www.sciencenews.org/view/issue/id/8114
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In This Issue
- Sequencing the dead to save the living: Reviving ancient genomes of long-extinct creatures offers a window into past extinctions—and may help prevent future die outs
- No gene is an island: Even as biologists catalog the discrete parts of life forms, an emerging picture reveals that life’s functions arise from interconnectedness
- The decider: Informing the debate over the reality of ‘free will’ requires learning something about the lateral habenula
- This week's table of contents
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January 13th, 2007
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The nutrient folic acid is generally good for brain health, but research now suggests that too much of it might harm people who get too little vitamin B12. (p. 19)
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New measurements of the speed of two familiar companion galaxies to the Milky Way suggest some unfamiliar possibilities. (p. 19)
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A shrimplike European invader just discovered in the Great Lakes could prove ecologically disruptive to populations of native lake animals. (p. 20)
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An experimental drug shows potential against schistosomiasis. (p. 20)
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The plants with the world's largest flowers, the rafflesias, need to be moved closer to poinsettias on the family tree of plant life. (p. 21)
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Two teams have independently discovered ways to dramatically improve the materials used in the electrodes of fuel cells. (p. 21)
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Recently discovered ribonucleic acid segments, called riboswitches, may become prime targets for new antibacterial drugs. (p. 22)
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Mounting, but controversial, evidence suggests that DNA flexes more easily than previously thought, with potentially important implications for genetics, cell biology, and nanotechnology. (p. 24)
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New methods to identify Internet users by their behavior can uncover criminals online, but these techniques may also track millions of innocent users. (p. 26)
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Federal mineralogists have corroborated earlier evidence that Sierra-foothills communities around Sacramento, Calif., are built atop soils naturally laced with asbestos. (p. 29)
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A new backpack design that uses elastic cords to minimize the pack's vertical motion could lessen bodily strain on wearers and reduce the effort required to carry a load. (p. 29)
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Several experimental drugs show promise against the bleeding disorder known as immune thrombocytopenic purpura. (p. 29)
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The herbal supplement black cohosh is no more effective than a placebo in reducing the number of daily hot flashes in menopausal women. (p. 29)
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Scientists have discovered a new type of stem cell in the fluid that bathes fetuses in the womb. (p. 30)
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Livestock production carries surprisingly high, and largely hidden, environmental costs. (p. 30)
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Congress has reauthorized and strengthened a 30-year-old federal law governing fishing and ocean management. (p. 30)
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Researchers have tracked down a pair of genes that, together, seem responsible for some insects' ability to sense carbon dioxide. (p. 30)
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(p. 31)
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Math Trek How to (really) trust a mathematical proof
Mathematicians develop computer proof-checking systems in order to realize century-old dreams of fully precise, accurate mathematics. Nov 14th 2008
Mathematicians develop computer proof-checking systems in order to realize century-old dreams of fully precise, accurate mathematics. Nov 14th 2008
California’s Fading Wildflowers: Lost Legacy and Biological Invasions
Review by Rachel Ehrenberg
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Review by Rachel Ehrenberg
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Extreme Birds: The World’s Most Extraordinary and Bizarre Birds
Firefly, 2008, 287 p., $45
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Firefly, 2008, 287 p., $45
Buy now | More Books
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