Vol. 167 No. #22

More Stories from the May 28, 2005 issue

  1. Why making fat is good for you

    Making new fat from food intake, as opposed to using stored fat, regulates genes important for blood sugar, fatty acid, and cholesterol concentrations.

    By
  2. Planetary Science

    Ringing in a new moon

    The Cassini spacecraft has spotted a new moon of Saturn, only the second known to lie within the planet's main rings.

    By
  3. Health & Medicine

    Enzyme stopper combats cancers

    An experimental drug combination that inhibits an enzyme that's abundant in tumor cells shows promise against several cancers.

    By
  4. Tech

    Carbon nanotubes drive X-ray scanner

    X-ray scanners based on carbon nanotubes could make airport luggage screening and high-tech medical imaging more efficient.

    By
  5. Health & Medicine

    Shot in the gut

    A mystifying case of lead poisoning, which may have lasted more than a decade, turned out to have been caused by a swallowed shotgun pellet.

    By
  6. Tech

    Nuke batteries get more practical

    Nuclear batteries that will last for decades may have moved closer to reality with the demonstration of a silicon chip riddled with radioactive, tritium-filled pits where radiation is efficiently converted to electricity.

    By
  7. Tech

    Morphing wheels for beginner bikers

    A new bike design for kids morphs from tricycle into bicycle as the rider gets moving, possibly easing the often-fearful starts at riding two-wheelers.

    By
  8. Ecosystems

    Pesticide makes bees bumble

    The pesticide spinosad, previously thought safe for bees, may damage their ability to forage for nectar.

    By
  9. Anthropology

    Founding Families: New World was settled by small tribe

    A new genetic analysis indicates that only about 200 to 300 people crossed the ice age land bridge from Asia to become the founding population of North America.

    By
  10. Earth

    Last Gasp: Toxic gas could explain great extinction

    Sudden venting of hydrogen sulfide from the deep sea could have caused the largest extinction in Earth's history by poisoning land animals and destroying atmospheric ozone that protects Earth from ultraviolet light.

    By
  11. Planetary Science

    Roaming Giants: Did migrating planets shape the solar system?

    New simulations suggest that the solar system's four biggest planets were once bunched together, setting up a planetary bowling game that rapidly and violently rearranged the structure of the outer solar system and tossed chunks of debris inward.

    By
  12. Mapping Aroma: Smells light up distinct brain parts

    The sense of smell may have its own brain atlas.

    By
  13. Materials Science

    Tissue Tether: Improved conducting plastic could boost nerve-regeneration success

    Biomedical engineers aim to repair damaged nerves with a chemically modified conducting polymer that stimulates the growth of nerve cells.

    By
  14. Health & Medicine

    Positive Jolt: Electroshock therapy may have side benefit

    People with depression have high concentrations of norepinephrine, a brain hormone, but electroshock treatment lowers these levels to the normal range.

    By
  15. Tech

    Fields of Beams: Carbon nanotubes crop up for big-screen TV

    Carbon nanotubes serve as the electron emitters that light up the screen of a new experimental, high-definition television display.

    By
  16. Planetary Science

    Roving on the Red Planet

    Scientists review the discoveries made by the Mars rovers after nearly 18 months on the Red Planet.

    By
  17. Health & Medicine

    Us against Them

    New antibiotics may be valuable weapons in the fight against tougher bacteria.

    By
  18. Humans

    Letters from the May 28, 2005, issue of Science News

    Hunger pangs I was interested to read about factors influencing the “hunger hormone’s”—ghrelin’s—effectiveness (“Still Hungry?” SN: 4/2/05, p. 216). One factor not considered but seemingly very significant is physical activity. I suggest that it is more useful to understand and encourage the positive effects of physical activity on overall well-being than to develop new drugs […]

    By