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Your search has returned 240 articles:
  • Science & the Public

    Growth-promoting antibiotics: On the way out?

    In 1950, Science News ran a story showing for the first time that a potent antibiotic could do more than knock out disease. New animal experiments, we reported, “cast the antibiotic in a spectacular new role” as a livestock growth promoter. Lacing the food of hogs with trace quantities of this drug increased meat yields by up to 50 percent, scientists at Lederle Laboratories had reported at a...

    03/23/2012 - 13:30 Humans & Society, Nutrition, Earth & Environment, Biomedicine, Agriculture
  • 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
  • Science & the Public

    The Costs of Meat and Fish

    “Can Meat and Fish Consumption Be Sustainable?” That’s the provocative title of a press release just sent to us by the Worldwatch Institute, a small but by now venerable think tank that focuses on natural resource issues.

    It’s also the theme of a chapter in Worldwatch’s 2008 State of the World report, its 25th annual book-length analysis of resource...

    03/13/2008 - 12:21 Earth & Environment, Nutrition, Humans & Society
  • 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
  • Food for Thought

    It's Spud Time

    As 2007 winds down, thoughts naturally turn towards what might lie ahead. Meals rich in high-carb tubers, perhaps? That's what the United Nations would like everyone to contemplate throughout 2008, which it is designating the International Year of the Potato.

    Farmers now harvest more than 300 million tons of potatoes (Solanum tuberosum) worldwide. That makes it the fourth biggest food...

    12/18/2007 - 18:43 Nutrition
  • 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

    Shadow World

    In a school of thought that teaches the existence of extra dimensions, Juan Maldacena may at first sound a little out of place. String theory is physicists' still-tentative strategy for reconciling Einstein's theory of gravitation with quantum physics. Its premise is that the subatomic particles that roam our three-dimensional world are really infinitesimally thin strings vibrating in nine...

    11/13/2007 - 13:43 Physics