Vol. 168 No. #3
Archive Issues Modal Example

More Stories from the July 16, 2005 issue

  1. Bacterial tresses conduct electricity

    New research suggests that several species of Geobacter bacteria use hairlike structures known as pili to move electrons.

  2. Health & Medicine

    Cells in heart can regenerate dead tissue

    Stem cells in heart tissue that has survived a heart attack can be prodded to regenerate dead portions of the injured organ.

  3. Health & Medicine

    Vaccines against Marburg and Ebola viruses advance

    Two new vaccines protect against the lethal Ebola and Marburg viruses, tests in monkeys show.

  4. Animals

    Is eyeless sea creature fishing with a red light?

    Researchers off the coast of California have captured three deep-water siphonophores, relatives of jellyfish, and observed in the lab that the creatures twitch little red lights that could be lures for fish.

  5. Hypnosis subdues the visual brain

    Hypnotic suggestions to perceive written words as gibberish depress activity in brain areas responsible for vision, possibly reflecting a hypnosis-induced decline in attention paid to visual objects.

  6. Tech

    Wiring up molecules

    Minuscule gaps of controlled sizes in gold microwires may serve as test sites for probing properties of specks of material as small as a single molecule and as a basis for novel sensors and circuit components.

  7. Health & Medicine

    Codes for Killers: Knowledge of microbes could lead to cures

    Scientists have deciphered the DNA of the parasites responsible for African sleeping sickness, Chagas' disease, and leishmaniasis.

  8. Health & Medicine

    Cancer Switch: Good gene is shut off in various malignancies

    A gene called Reprimo is shut down in several cancers but rarely in healthy cells.

  9. Health & Medicine

    Brain Power: Stem cells put a check on nerve disorders

    Adult neural stem cells protect the brain against repeated episodes of inflammation in disorders such as multiple sclerosis by killing inflammatory immune cells.

  10. Earth

    Power-laden winds sweep North America

    There's more than enough wind power to satisfy the United States' energy requirements, a new analysis of weather data suggests.

  11. Earth

    Arctic Foulers: Foraging seabirds carry contaminants home

    When seabirds go out looking for food, they can bring home traces of pollutants that build up around their nesting colonies.

  12. Earth

    Pollution Ups Blood Pressure: Inhaled particles linked to transient effect

    In a laboratory setting, volunteers breathing pollutants generated by sources such as vehicle engines experience slight but steady increases in blood pressure.

  13. Physics

    Realistic Time Machine? New design could forgo exotic ingredient

    A novel time machine concept may avoid a problem of earlier, less-practical proposals by requiring only normal matter and the vacuum known to exist in space.

  14. Astronomy

    Triple Play: A planet with three suns

    Three suns grace the skies above a newly found, Jupiterlike extrasolar planet, posing a puzzle for how massive planets form in a closely-knit, multiple-star system.

  15. Physics

    Dr. Feynman’s Doodles

    A new U.S. postage stamp honoring physicist and folk hero Richard P. Feynman sports curious squiggles, invented by Feynman, that were rejected at first but soon became a major tool of physicists everywhere for picturing the behaviors and calculating the properties of matter and energy.

  16. Materials Science

    Bright Future

    Energy-efficient, semiconductor-based chips called light-emitting diodes will begin to illuminate homes and offices within the next decade, displacing power-hungry incandescent and fluorescent lighting.

  17. Earth

    Letters from the July 16, 2005, issue of Science News

    Muddy, clarified “Muddy Waters” (SN: 5/21/05, p. 328), on the deleterious effect of dams on coastal systems, contains a major conceptual error. It states that “another important cause of the ground sinking is the waning of sediment deposition by the Mississippi River.” But over the past 100 million years, the northern Gulf Coast region has […]