Vol. 173 No. #19
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More Stories from the June 21, 2008 issue

  1. Humans

    Butting out together

    Cigarette smokers who know one another tend to kick the habit all at once, highlighting the importance of social forces in smoking-cessation treatment.

  2. Anthropology

    They’re fake, Indy!

    Scientists find that two rock crystal skulls often attributed to pre-Columbian societies are really modern phonies.

  3. Planetary Science

    Touchdown! Phoenix lands on Mars

    The first close-up color images of the northern arctic circle on the Red Planet were recorded by the Mars Phoenix Lander spacecraft only a few hours after its flawless descent at 7:38 p.m. EDT, May 25. The detailed images suggest ice lies beneath the hard soil.

  4. Health & Medicine

    Tracking obesity

    New data suggest that childhood obesity in the United States may have leveled off between 1999 and 2006.

  5. Life

    Fly fountain of youth

    Hanging out with young, healthy flies helps fruit flies with a mutation that causes neurodegeneration live longer.

  6. Paleontology

    Walking tall

    Some types of the largest flying reptiles ever known were well adapted to life on the ground.

  7. Health & Medicine

    Lead’s legacy

    High levels of lead in the blood during childhood are associated with smaller brains and with an increased risk for violent criminal behavior, report two new studies.

  8. Earth

    Life down deep

    Deep-sea sediments provide a habitat for diverse and abundant populations of microorganisms and may be home to as much as 70 percent of the bacteria on the planet, new studies suggest.

  9. Health & Medicine

    Monkey think, robotic monkey arm do

    In a step toward someday making brain-controlled prosthetic arms for people, scientists have trained monkeys to control a robotic arm with their thoughts. Click on the image to read the story and see the video.

  10. Archaeology

    Domain of the dead

    Researchers say that Stonehenge functioned as the largest cemetery of its time.

  11. Life

    Tracing human roots

    Using a new method of data analysis, researchers have found that the Americas were peopled in two different migrations.

  12. Planetary Science

    Small exoplanet discovered

    Astronomers have discovered the smallest planet known that is beyond the solar system and orbits an ordinary parent body.

  13. Space

    Better view of the Milky Way

    New studies revise the structure of the Milky Way, exchanging the old map of a four-armed spiral galaxy for a two-arm version. The makeover also includes the discovery of a smaller, short, gaseous arm that is a long-sought counterpart to a similar arm near the galaxy’s center.

  14. Earth

    Tunguska, a century later

    Asteroid or comet blamed for Siberian blast of 1908

  15. Space

    Sizing up black holes

    ST. LOUIS—Astronomers are all wound up over a new method for sizing up supermassive black holes found at the cores of galaxies. The method allows researchers for the first time to estimate the weight of these black holes in spiral galaxies up to 8 billion light-years away, or halfway across the universe, reports Marc Seigar […]

  16. Health & Medicine

    Nabbing suspicious SNPs

    Scientists search the whole genome for clues to common diseases.

  17. Health & Medicine

    Thanks for the future memories

    To the brain, remembering the past and visualizing the future look surprisingly similar.

  18. Chemistry

    Small, But Super

    These 'atoms' can't leap tall buildings in a single bound, but they have special powers.