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Your search has returned 20 articles:
  • News

    Prep Work: Bird-flu vaccine might work better with primer

    Avian-influenza virus is evolving, so no one can predict the exact genetic makeup of a killer bird-flu strain that would spread from person to person and cause a pandemic. So, if such a strain arose, manufacturers would be hard-pressed to rapidly make enough effective vaccine.

    Scientists are looking for ways to stretch the amount of vaccine that would be available. One team now reports...

    10/17/2006 - 20:05 Biomedicine
  • News

    Assault on Andromeda: Nearby galaxy had recent collision

    If the dinosaurs ever looked skyward, they might have been treated to a rare spectacle. About 210 million years ago, a small galaxy plunged into Andromeda—the spiral galaxy closest to the Milky Way. Streamers of stars created by the collision would have been visible for million of years. Although the minor galaxy moved on, Andromeda still holds signs of the encounter. These include a newly...

    10/17/2006 - 20:04 Astronomy
  • News

    Vanishing Actor: Physicists unveil first invisibility cloak

    It might not seem like much compared with Harry Potter's magic garment, but the first functional invisibility cloak has emerged from a North Carolina laboratory.

    The disk of concentric fiberglass-and-copper bands—about the size of a cocktail coaster—bends a narrow-frequency range of microwaves around a protected zone at its center. By then reorienting those electromagnetic...

    10/17/2006 - 20:01 Physics
  • News

    Quirky Cardiology: Crocs' hearts may aid their digestion

    The crocodile's ability to direct oxygen-depleted blood to its stomach may be instrumental in digesting large, bony meals and recovering from hunting-induced accumulation of lactic acid, some researchers propose. But other scientists argue that the croc's unique circulatory system is instead an adaptation for lengthy dives, during which the animal must hold its breath as it stalks and then...

    10/17/2006 - 19:59
  • News

    Back on the Table? Element 118 is served up again

    New research suggests that the periodic table may once again reach 118. A team of nuclear chemists from the United States and Russia has announced the brief appearance of the unnamed element, the heaviest to date.

    A report of element 118 had made a splash before. In 1999, a group at Lawrence Berkeley (Calif.) National Laboratory claimed that it had created the element by bombarding lead...

    10/17/2006 - 19:53 Chemistry
  • News

    A sunrise view of Mars

    Darkened gullies slice down the edge of a crater in one of the first high-resolution images sent by the Mars Reconnaissance Orbiter.

    The sharp edges of the channels suggest that they are no more than a few million years old. NASA scientists say that the braided gullies look as if sediment-rich streams had carved them, supporting the notion that water once flowed across much...

    10/17/2006 - 19:37 Planetary Science
  • News

    Horns vs. Sperm: Male beetles on tight equipment budget

    A group of dung beetle species that sprout horns like tiny elk, rhinos, or sci-fi invaders often face trade-offs between horn and testes sizes, say researchers.

    Among the 2,000 species of Onthophagus dung beetles, males sport various styles of swooping prongs, with which they wrestle other males for access to females. "That's like producing another leg and wearing it around...

    10/17/2006 - 19:35
  • News

    Autism's DNA Trail: Gene variant tied to developmental disorder

    Scientists have taken a promising step forward in untangling the genetic roots of autism. Inheritance of a common variant of a gene that influences immunity, gastrointestinal repair, and brain growth substantially raises the chances of developing autism, at least in families with more than one child diagnosed with the severe brain disorder, a study finds.

    Children with autism show...

    10/17/2006 - 19:33
  • Feature

    Swirling Seas, Crystal Balls

    A field of triangles crumples and twists into a wavy crystalline sea. A crystal ball sprouts spiraling, labyrinthine passages. Faceted bricks stack snugly into a tidy, compact structure. Underlying each of these objects is a remarkable geometric shape made up of a sequence of triangles—a spiral polygon that resembles a seahorse's tail.

    ...

    10/17/2006 - 19:21 Numbers
  • News

    Air's oxygen content constrains insect growth

    From Virginia Beach, Va., at a meeting of the American Physiological Society

    The size to which insects grow is limited by how much oxygen they can route to tissues in their legs, new airway measurements suggest.

    The researcher knew that some insects grow particularly large when reared in high-oxygen laboratories and that massive insects that lived during the prehistoric Paleozoic...

    10/17/2006 - 18:48