Vol. 158 No. #5
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More Stories from the July 29, 2000 issue

  1. Physics

    Matter’s Missing Piece Shows Up

    The first direct evidence of the tau neutrino, the last of the 12 subatomic particles considered the fundamental building blocks of matter, has finally been found.

  2. Study of stimulant therapy raises concerns

    A community survey in North Carolina indicates that many children receiving stimulant treatment don't have attention-deficit hyperactivity disorder.

  3. Mom, is that you? Seals show family recall

    Researchers found that northern fur seal mothers and offspring in Alaska remember and respond to each other's calls for as long as 4 years, the first demonstration of such long-term recall in a mammal species other than humans.

  4. Astronomy

    Telescope finds tiny moon of Jupiter

    Astronomers reported the discovery of Jupiter's 17th known moon, the first Jovian moon discovered in 25 years and perhaps the tiniest known satellite of any planet.

  5. Earth

    Newfound gas is greenhouse powerhouse

    Scientists have detected in the atmosphere for the first time a gas that traps heat more effectively than any other previously found there.

  6. Materials Science

    A new carbon nanotool springs to life

    Physicists have pulled out the inside cylinders of multiwall carbon nanotubes, as if expanding a telescope, indicating how the devices may serve as tiny bearings and springs in future nanomachines.

  7. Health & Medicine

    Molecule may protect against kidney damage

    People with a gene for the protein called apoE-IV are less likely to have the dangerous complication of kidney failure after a heart-bypass operation than are people who make other versions of the protein.

  8. Astronomy

    A comet’s chilly origin

    Astronomers have detected argon in comet Hale-Bopp, the first time an inert gas has been found in one of these icy bodies and an indication that the comet formed in the frigid outer solar system between the orbits of Uranus and Neptune.

  9. Astronomy

    X-ray flare from a dim source

    An X-ray flare coming from a old, failed star has surprised astronomers.

  10. Looking for the brain’s g force

    Controversial evidence suggests that a frontal-brain network underlies psychological measures of general intelligence.

  11. When autism aids memory

    People with autism may often have a superior memory for factual details, possibly because of their inability to use context in remembering information.

  12. Earth

    Living routes to toxic routs

    Scientists are developing novel techniques for removing perchlorate, a potentially carcinogenic pollutant, from water.

  13. Earth

    China: A mercury megapolluter

    China's heavy reliance on coal burning makes it a world leader in mercury air pollution.

  14. Earth

    Methylmercury’s toxic toll

    More than 60,000 children are born each year with neurodevelopmental impairments due to their prenatal exposure to methylmercury.

  15. Earth

    When do EMFs disturb the heart?

    Whether electromagnetic fields can blunt the healthy variability in heart rate may depend on an exposed individual being aroused or stressed during exposure.

  16. Agriculture

    Detoxifying Desert’s Manna

    Farmers need no longer fear the sweet pea's dryland cousin.

  17. Humans

    When Biologists Get Bombed

    Or shot at by soldiers. This isn't textbook conservation science.