Vol. 172 No. #6
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More Stories from the August 11, 2007 issue

  1. Planetary Science

    Deep Impact and Stardust: Still on assignment

    Two sturdy NASA spacecraft have new assignments, studying comets and looking for exoplanets.

  2. Earth

    Cholesterol boosts diesel toxicity

    Nanoparticles in diesel exhaust can activate genes that worsen cholesterol's damaging effects.

  3. Animals

    Gender bender

    Disabling a chemical-sniffing organ crucial for courting behavior makes girl mice act like frisky boys.

  4. Health & Medicine

    CT heart scans: Risk climbs as age at screening falls

    CT scans are increasingly used to investigate heart blockages, but their X rays can increase cancer risk.

  5. Materials Science

    Pliable carbon

    The layers of carbon atoms that form graphite can be assembled into strong but flexible "graphene paper."

  6. Astronomy

    Veiled black holes

    Many X ray sources in the sky could be active galactic nuclei smothered by gas and dust that blocks their emission of visible and ultraviolet light.

  7. Earth

    Beware summer radon-test results

    Measuring household radon levels in summer may give misleadingly low results.

  8. Health & Medicine

    Serotonin lower in shift workers

    Workers who rotate between day and night shifts have less of the brain chemical serotonin than day shift workers do.

  9. Health & Medicine

    Skeletal Discovery: Bone cells affect metabolism

    A protein made by bone cells has a surprising influence on energy metabolism, and could have a role in treating diabetes.

  10. Animals

    Ferrets Gone Wild: Reintroduced animals coming back in Wyoming

    A Wyoming population of endangered black-footed ferrets, started from captive-bred animals, has survived difficulties and is doing well.

  11. Earth

    Bad for Baby: New risks found for plastic constituent

    Early exposure to bisphenol A, a building block of polycarbonate plastics, can trigger a variety of later health problems.

  12. Health & Medicine

    Nerve Link: Alzheimer’s suspect shows up in glaucoma

    Amyloid-beta, the protein fragment implicated in Alzheimer's disease, may also play a role in glaucoma.

  13. Earth

    Drug Overflow: Pharmaceutical factories foul waters in India

    A treatment plant in India that processes waste from drug factories feeds enormous amounts of antibiotics and other drugs into local waterways.

  14. Bad News, Good News: ADHD-risk gene has silver lining

    A gene variant that increases the risk for attention deficit-hyperactivity disorder in young children also helps the problem resolve by the teen years.

  15. Physics

    Newton’s Dusty Mirror: Old experiment inspires ultrafast imaging

    An experiment devised by Isaac Newton inspires a modern successor, in which X rays capture the image of a microscopic explosion.

  16. Health & Medicine

    Taking a Jab at Cancer

    Vaccines that train a person's immune system to kill cancerous cells, when combined with drugs that block tumor defense mechanisms, are starting to show promise.

  17. Earth

    Hammered Saws

    Sawfish, shark relatives that almost went extinct several decades ago, have now gained protection by international treaty.

  18. Humans

    Letters from the August 11, 2007, issue of Science News

    Sum kids While testing was done on 5- or 6-year-old children (“Take a Number: Kids show math insights without instruction,” SN: 6/2/07, p. 341), it would be interesting to see if this intuitive skill persists after these students are exposed to standard mathematical instruction in the higher grades. I suspect that the answer will be […]