Vol. 172 No. #12
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More Stories from the September 22, 2007 issue

  1. Astronomy

    Cosmic void

    A region of the cosmos a billion light-years across is devoid of all matter.

  2. SSRI use declines, youth suicides rise

    In the United States and the Netherlands, youth suicides have increased as the number of antidepressant prescriptions for children and teenagers has fallen, raising concerns that regulatory warnings about these drugs have backfired.

  3. Earth

    Meteor dust layers taint Antarctic ice

    Two layers of deep Antarctic ice, each hundreds of thousands of years old, are rich in meteoritic dust.

  4. One tall gene

    The first reported gene for height can account for almost a centimeter of difference among people who have different versions of it.

  5. Anthropology

    Walking Small: Humanlike legs took Homo out of Africa

    Newly discovered fossils, 1.77 million years old, show that the earliest known human ancestors to leave Africa for Asia possessed humanlike legs, feet, and spines, but strikingly small brains and primitive arms.

  6. Aiding and Abetting: A longevity gene also promotes cancer

    A gene that normally helps cells overcome stress can also promote cancer, perhaps offering a new target for cancer treatment.

  7. Animals

    Hybrid Power: Salamander invader ups survival of rare cousin

    Mixed offspring of the endangered California tiger salamander and an invasive cousin survive better than either pure-bred species, raising tricky questions for conservationists.

  8. Chemistry

    Nanotherapy: Gold-drug combo could target tumors

    Clusters of paclitaxel molecules attached to gold nanoparticles could deliver a safer and more effective chemotherapy punch to tumors.

  9. Planetary Science

    Muddying the Water? Orbiter drains confidence from fluid story of Mars

    New images of Mars diminish the evidence that liquid water has flowed on some parts of the planet, but bolster the case in other places.

  10. Paleontology

    Bumpy Bones: Fossil hints that dinosaur had feathery forearms

    A series of knobs on the forearm bone of a 1.5-meter-long velociraptor provides the first direct evidence of substantial feathers on a dinosaur of that size.

  11. Tech

    Nanotube Press: Printing technique makes nanotransistors

    A new technique for printing networks of carbon nanotubes on a wide range of surfaces is a step toward mass production of nanotubes devices.

  12. Health & Medicine

    Warming to a Cold War Herb

    Benefiting from decades of research that took place behind the Iron Curtain, Western physicians are discovering Rhodiola rosea, a cold-weather herb that purportedly fights fatigue and boosts energy.

  13. Health & Medicine

    The Breast Solution

    Reversing earlier advice, health authorities now say that babies of HIV-positive mothers in poor countries have a better chance of avoiding infection if they feed only on breast milk that's not supplemented with other food.

  14. Humans

    Letters from the September 22, 2007, issue of Science News

    Personnel question In “E-Waste Hazards: Chinese gear recyclers absorb toxic chemicals” (SN: 7/14/07, p. 20), researchers found “astronomical concentrations” of deca-BDE in the residents of Guiyu, and the article cites studies showing that related PBDEs harm brain development in mice and rats. So, has any actual increase in brain-development problems been found in people in […]