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Your search has returned 18 articles:
  • News

    Neck Bones on the Menu: Fossil vertebrae show species interaction

    Three fossil neck bones from an ancient flying reptile—one of them with the broken tip of a tooth embedded in it—indicate that the winged creatures occasionally fell victim to meat eaters.

    The telltale vertebrae were found within a limestone nodule unearthed from 100-million-year-old sedimentary rocks in northeastern Brazil. Each about 4 centimeters long, the neck bones represent...

    06/30/2004 - 12:12 Paleontology
  • News

    Rewriting the Nitrogen Story: Plant cycles nutrient forward and backward

    A study of a little yellow flower could add a new arrow to textbook drawings of the nitrogen cycle.

    The horseshoe vetch (Hippocrepis comosa), a European relative of beans, is the first plant discovered to break down nitrogen-containing compounds in its tissues into a readily usable nitrate form, report Charles Hipkin of the University of Wales in Swansea and his colleagues....

    06/30/2004 - 11:51 Plants
  • News

    Erectus Experiment: Fossil find expands Stone Age anatomy

    During the heart of the Stone Age, from 1.7 million to 400,000 years ago, populations of our ancient ancestors in Africa, Asia, and Europe often served as brief evolutionary experiments, with most dying out before they established themselves as truly distinct species.

    At least that's the implication of a peculiar fossil skull unearthed in eastern Africa last summer, according to...

    06/30/2004 - 11:36 Anthropology
  • News

    Before the Booze: Cactus extract dulls hangovers

    An inflammation-fighting plant extract, taken hours before consuming alcohol, appears to suppress some of the symptoms brought on by a bout of heavy drinking. The new study, supported by the extract's manufacturer, may have intriguing implications for understanding and preventing the effects of excessive alcohol consumption.

    Too much alcohol increases short-term inflammation and can...

    06/30/2004 - 11:09 Biomedicine
  • News

    Powerhouse Astronomy: Blazing black hole from the early universe

    A jet of matter and radiation shooting from a newly discovered black hole could provide new information about the radiation left over from the Big Bang and about the first galaxies. This monster black hole, one of the heaviest and most distant known, was already gargantuan when the universe was only a billion years old.

    Estimated to weigh as much as 10 billion suns and residing...

    06/30/2004 - 10:41 Astronomy
  • News

    Sweet Frequency: Implantable glucose sensor transmits data wirelessly

    A new glucose sensor could help people with diabetes gain better control over their blood sugar while eliminating the hassles of daily pinprick tests. The researchers at Pennsylvania State University in State College who developed the sensor were inspired by the magnetic antitheft strips frequently found on commercial merchandise, such as CDs.

    The sensor consists of a 4-centimeter-long...

    06/30/2004 - 10:30 Technology
  • News

    SARS Control: First nasal vaccine effective in monkeys

    Inhaling a new experimental vaccine may offer protection against severe acute respiratory syndrome, or SARS. The vaccine, tested in African green monkeys, is the first to be administered directly to the respiratory tract and is also the first that confers immunity with a single dose.

    "This could be used for local outbreak control," says Peter L. Collins of the National Institute...

    06/30/2004 - 10:10 Biomedicine
  • News

    Ultrasound alarms by ground squirrels

    From Oaxaca, Mexico, at a meeting of the Animal Behavior Society

    Richardson's ground squirrels may squeak out ultrasonic calls when sensing danger, thereby alerting nearby squirrels but minimizing the noise that might be detected by predators.

    Ultrasonic communication has been reported in other rodent species, though not as threat warnings, says David Wilson of the University of...

    06/29/2004 - 10:30 Animals
  • News

    Why does a buddy help another male flirt?

    From Oaxaca, Mexico, at a meeting of the Animal Behavior Society

    Male lance-tailed manakins put on a two-guy show when courting females, but only the alpha bird reaps the immediate benefits when the performance succeeds, says a new study.

    So, what's in it for the sidekick? An earlier study in a different species of manakin suggested that courtship cooperation gave the unrequited...

    06/29/2004 - 10:20 Animals
  • News

    Farmer ant species may have lost all its males

    From Oaxaca, Mexico, at a meeting of the Animal Behavior Society

    Minuscule gardeners that grow fungus for food may be the first ant species that scientists have discovered to have no power of sexual reproduction. Several lines of evidence suggest that the species Mycocepurus smithii consists only of females that produce daughters from unfertilized eggs, says Anna Himler of the...

    06/29/2004 - 10:14 Animals