Vol. 172 No. #9
Download PDF Modal Example Archive Issues Modal Example

More Stories from the September 1, 2007 issue

  1. Health & Medicine

    When antioxidants go bad

    Overproduction of antioxidants, usually thought to be beneficial, is the cause of an inherited heart disease.

  2. Believers gain no health advantage

    Strong religious beliefs or practices don't appear to benefit depressed or socially isolated heart attack survivors.

  3. Animals

    Bats hum for sugar too

    Some nectar-feeding bats metabolize sugars as rapidly as hummingbirds do.

  4. Earth

    Arctic snow was dirtier in early 1900s

    Arctic snow collects less soot now than it did a century ago, but it's still dirtier than it was before the Industrial Revolution.

  5. Tech

    Corny collagen

    Corn engineered to produce collagen may someday replace slaughterhouse leftovers as a source of gelatin.

  6. Light switch

    A photosensitive molecule makes switching off a gene as simple as flicking on a light.

  7. Earth

    Tiny tubes, big pollution

    Making carbon nanotubes also produces a lot of airborne carcinogens.

  8. Humans

    Urine tests for cities

    Analysis of sewage gauges community-wide use of illegal drugs.

  9. Share Alike: Genes from bacteria found in animals

    Bacteria swap genes all the time, but it now appears that they can give their DNA to some animals as well.

  10. Barely Alive: Ancient bacteria survive in the slow lane

    Microbes locked in 500,000-year-old permafrost appear to breathe and show other signs of very slow life.

  11. Plants

    Cretaceous Corsages? Fossil in amber suggests antiquity of orchids

    Orchids appeared on the scene about 80 million years ago, according to evidence from a bee that collected orchid pollen and got trapped in amber.

  12. Earth

    Oxygen Rocks: Volcanoes spurred early atmospheric change

    Earth owes its oxygen-rich atmosphere to a change in volcanic activity about 2.5 billion years ago.

  13. No-Fight Zones: School programs reduce violence in all grades

    A variety of school-based programs succeed in reducing students' violent and disruptive behavior.

  14. Astronomy

    Dawn of a Disk: Water vapor pours down on embryonic star

    Infrared observations show water vapor pouring down on a planet-forming disk around a young star.

  15. Health & Medicine

    Bad Bug: Microbe raises stomach cancer risk

    A gene in some strains of the bacterium Helicobacter pylori may greatly increase the risk of stomach cancer.

  16. Rethinking Bad Taste

    Many animals use mimicry to gain a competitive advantage, but are there degrees of cheating?

  17. Humans

    The Wealth of Nations

    Analysis of the connections among different types of economic activities explains why some countries succeed, and others fail, in diversifying their economies.

  18. Humans

    Letters from the September 1, 2007, issue of Science News

    Risk reversal? “Diabetes drug might hike heart risk” (SN: 6/23/07, p. 397) reports 86 heart attacks among 15,560 rosiglitazone (Avandia) users, versus 72 others in a control group of 12,283. A study coauthor then says that “after statistical adjustment, that yields a 43 percent higher risk of heart attacks among rosiglitazone users.” Simple arithmetic would […]