Vol. 172 No. #7
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More Stories from the August 18, 2007 issue

  1. Animals

    Badly matched birds make troubled parents

    Cockatiel pairs that don't cooperate well have trouble raising their chicks.

  2. Animals

    What’s so great about ‘chuck’?

    A particular flourish in a male frog's call attracts extra interest from predators as well as female frogs, and researchers now have an idea why.

  3. Earth

    How reading may protect the brain

    People who read well show more resistance to the toxic brain effects of lead exposure.

  4. Tech

    Uncharted atomic landscapes

    A refinement to electron microscopes enables them not only to visualize atoms but also to identify different elements.

  5. Health & Medicine

    Anti-inflammatory prevents pancreatic cancer in mice

    An anti-inflammatory drug of the COX-2 inhibitor family blocks precancerous lesions in mice prone to pancreatic cancer.

  6. Planetary Science

    Geyser gawker: Plans for a closer look at Enceladus

    The Cassini spacecraft will change course to take a close look next March at plumes of water vapor emanating from the south pole of Saturn's moon Enceladus.

  7. Mood Bugs: Beetle changes color in fluid fashion

    A Central American beetle changes color in a novel way, using its body fluid to control the reflectivity of its shell.

  8. Health & Medicine

    Calming Factor: DNA vaccine for MS passes initial test

    A DNA vaccine against multiple sclerosis passes a safety trial and shows signs of suppressing immune-directed nerve damage.

  9. Tech

    A Moment in the Life of a Cell: Microscopic scan images without intruding

    A laser technique similar to a CAT scan produces 3-D images of living cells without the need for chemical staining.

  10. Materials Science

    Shocking Sheets: Power paper packs a punch

    Ultrathin sheets made from cellulose and carbon nanotubes could serve as flexible, versatile batteries.

  11. Protein Lineages: Randomness was crucial to ancient genetic changes

    Reconstruction of an ancient protein shows how seemingly unimportant mutations paved the way for its evolution into a molecule with an essential modern role.

  12. Depression Defense: Sick elderly get mood aid from home treatment

    Instructional therapy to promote coping strategies helps elderly people with incipient blindness ward off depression—at least in the short run.

  13. Physics

    Road Bumps: Why dirt roads develop a washboard surface

    Experiments and a computer simulation show why dirt roads develop a washboard surface, and indicate the only way to prevent it: Drive very slowly.

  14. Planetary Science

    Idiosyncratic Iapetus

    The strange appearance of Saturn's moon Iapetus suggests that it was frozen in shape soon after birth, providing a glimpse into conditions in the early solar system.

  15. Chemistry

    Alien Pizza, Anyone?

    Although many biochemical molecules come in left-handed and right-handed versions, life on Earth uses one version exclusively, and some controversial experiments suggest this preference might not be due to chance.

  16. Humans

    Letters from the August 18, 2007, issue of Science News

    Exhaustive analysis I would debate the “1,000 watts or more” value attributed to typical adults during strenuous exercise (“Powering the Revolution: Tiny gadgets pick up energy for free,” SN: 6/2/07, p. 344). Hiking up steep slopes, I rarely exceed 250 W myself, and typical hikers are going much slower. The 1,000-watt figure can only apply […]