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Your search has returned 146 articles:
  • News

    Obesity messes with the brain

    Obesity subtly diminishes memory and other features of thinking and reasoning even among seemingly healthy people, an international team of scientists reports. At least some of these impairments appear reversible through weight loss. Researchers also report one likely mechanism for those cognitive deficits: damage to the wiring that links the brain’s information-processing regions.

    A...

    03/25/2011 - 12:00 Nutrition, Body & Brain
  • Feature

    Back from the Dead?

    In December 1938, Marjorie Courtney-Latimer, curator of a natural history museum in East London, South Africa, went to the docks to look for interesting specimens among the day's catch. What she found one day she later described as "the most beautiful fish I had ever seen ... a pale mauve blue with iridescent silver markings." The discovery sent scientists into a frenzy.

    ...

    11/13/2007 - 11:15 Paleontology
  • Food for Thought

    Troubling Meaty 'Estrogen'

    Women take note. Researchers find that a chemical that forms in overcooked meat, especially charred portions, is a potent mimic of estrogen, the primary female sex hormone. That's anything but appetizing, since studies have linked a higher lifetime cumulative exposure to estrogen in women with an elevated risk of breast cancer.

    Indeed, the new finding offers a "biologically...

    10/17/2007 - 01:38 Nutrition
  • News

    Role Change: Mast cells show an anti-inflammatory side

    As anyone who has reacted to poison ivy can attest, the plant can induce maddeningly itchy skin. Researchers have now found that a cell once thought to be one of the chief perpetrators of this immune overreaction may actually keep the reaction from getting out of hand.

    Mast cells make proteins that contribute to the inflammation that characterizes allergic reactions. The...

    09/05/2007 - 09:17
  • News

    Drug Overflow: Pharmaceutical factories foul waters in India

    Pharmaceuticals ranging from painkillers to synthetic estrogens can harm aquatic life when they enter waterways through human excreta, hospital and household waste, and agricultural runoff. Now, researchers have shown that there's another way for such drugs to get into the environment: A treatment plant in India that processes wastewater from pharmaceutical manufacturers discharges highly...

    08/08/2007 - 16:25 Earth & Environment
  • News

    Stunting Growth: Ozone will trim plants' carbon-storing power

    Increases in low-altitude ozone predicted for the upcoming century will stifle the growth of vegetation in many regions, causing planet-warming carbon dioxide to build up in Earth's atmosphere more quickly than had been expected, a new model suggests.

    Low-altitude ozone—as opposed to the planet-protecting layer of the gas in the stratosphere—forms when the sun's ultraviolet...

    07/25/2007 - 12:49 Earth
  • News

    Universities seek armchair astronomers

    Nonscientists and researchers alike have a chance to see something no one else ever has—a few of the million far-off galaxies that the Sloan Digital Sky Survey has recently photographed. The price of admission: People viewing the new images online must do a little work for the astronomers in charge, classifying individual galaxies as either spiral armed or elliptical collections of stars....

    07/23/2007 - 14:59 Humans & Society
  • News

    Age and gender affect soot's toxic impact

    From second to second, blood vessels must alternately constrict and dilate to regulate blood flow. That ability can diminish markedly in rodent vessels exposed to an oily constituent of diesel soot, researchers report.

    The team took arteries from rats' thighs and exposed them to the soot chemical phenanthraquinone.

    Vessels came from female rats that were 6, 14, and 24 months old—...

    06/12/2007 - 13:23 Earth & Environment
  • News

    Slimming on oolong

    Without skimping on portions, rats eating diets including oolong tea gain less weight than those dining teafree, a new study finds. The tea apparently impairs the body's ability to absorb fat.

    The finding supports a weight-control strategy—oolong consumption—advocated by practitioners of traditional Chinese medicine, note Lauren E. Budd and her colleagues at the University of California...

    05/15/2007 - 15:09 Nutrition
  • News

    A smart pill for seniors?

    From Washington, D.C., at the Experimental Biology 2007 Conference

    Many people approaching retirement age find that memories fade and quick-wittedness flags. Scientists at the University of Massachusetts in Lowell have formulated what they call a "smart pill" to optimize brain health in such people. In pilot trials, its combination of dietary supplements boosted performance on simple...

    05/08/2007 - 14:49 Nutrition