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Your search has returned 74 articles:
  • News

    E. coli evade detection by going dormant

    Researchers think they now know why a particularly virulent form of E. coli that swept through northern Germany last May was so hard to trace: The germs responsible eluded detection by going into a self-induced deep sleep.

    Two new studies show that when stressed, E. coli can turn off most signs of life. That’s a problem for food-safety officials because their germ-screening...

    12/06/2011 - 11:04 Nutrition, Earth & Environment
  • Feature

    Big Fishing Yields Small Fish

    Sharks, billfish, cod, tuna and other fish-eating fish — the sea’s equivalents to lions on the Serengeti — dominated the marine world as recently as four decades ago. They culled sick, lame and old animals and kept populations of marine herbivores in check, preventing marine analogs of antelopes from overgrazing their environment.

    But the reign of large predators now...

    03/25/2011 - 11:51
  • News

    Mice robbed of darkness fatten up

    When it comes to weight management, the timing of dining is pivotal, a new study indicates. At least in rodents, food proved especially fattening when consumed at the wrong time of day.

    As nocturnal animals, mice normally play and forage at night, often in complete darkness. With even dim chronic illumination of their nighttime environment, however, the animals’ hormonal dinner bells...

    10/11/2010 - 15:02 Nutrition, Earth & Environment, Body & Brain
  • Feature

    Nurturing Our Microbes

    Each of us is a metropolis. Bustling about in everyone's body are tens of trillions of microbes. Some are descended from starter populations provided by mom during birth. Additional bacteria, yeasts, and other life forms hitchhike in with foods. By age 3, everyone's gut hosts a fairly stable, yet diverse, ecosystem.

    Most of the tiny stowaways hide out in the...

    02/26/2008 - 12:45 Biomedicine
  • Feature

    Lettuce Liability

    Little more than a year ago, supermarkets from coast to coast stripped fresh spinach from produce aisles as a food-poisoning outbreak swept the nation. From mid-August through September 2006, virulent bacterial infections sickened at least 204 spinach consumers. Five died and 30 others suffered acute kidney failure.

    Among more than 3,500 genetically unique...

    12/03/2007 - 19:41 Agriculture
  • News

    Tadpole Slayer: Mystery epidemic imperils frogs

    From Alaska to Florida, a novel and yet-unnamed protozoan is knocking off tadpoles. Species vulnerable to "the beast" belong to the genus Rana, which includes leopard frogs, green frogs, and bullfrogs, says ecologist John C. Maerz.

    His team at the University of Georgia in Athens stumbled across mass die-offs of southern leopard frog tadpoles in nearby ponds last year. Dissection...

    11/19/2007 - 10:53
  • 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
  • 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
  • Feature

    Taken for a Spin

    To illustrate the amazing properties of spider silk, Nikola Kojic offers an arresting example. Imagine a circular web with a diameter of 100 meters—about the length of a football field—spun from a silk thread about a centimeter thick. Concentric circles 4 cm apart attach to the web's spokes, also 4 cm apart. This larger-than-life web "could stop a jumbo jet in midflight," says Kojic.

    ...

    04/10/2007 - 10:34 Materials
  • News

    New solutions for unused drugs

    A dilute stream of prescription drugs flows through the nation's rivers. To help cut that flow, representatives of the federal government and a pharmacists' trade group want consumers to stop flushing most old drugs down the toilet.

    Some 3 to 7 percent of dispensed medicines go unused, according to estimates by the Pharmaceutical Research and Manufacturers of America in...

    04/03/2007 - 18:21 Earth & Environment