Vol. 162 No. #4
Archive Issues Modal Example

More Stories from the July 27, 2002 issue

  1. Archaeology

    Ancient site yields a copper whopper

    Excavations in Jordan revealed the largest known Early Bronze Age metal-production facility, where workers crafted high-quality copper tools and ingots beginning around 4,700 years ago.

  2. Health & Medicine

    Hormone therapy falls out of favor

    Several studies now indicate that health risks associated with hormone replacement therapy for postmenopausal women outweigh its benefits.

  3. Chemistry

    Material could halt catalyst waste

    New research suggests a way that carmakers might use less of expensive metal materials in automobiles' catalytic converters.

  4. Health & Medicine

    Gene might contribute to asthma risk

    Variations in a gene called ADAM33 may predispose a person to asthma.

  5. Paleontology

    Unknown creature made birdlike tracks

    Paleontologists have found a multitude of birdlike footprints left by a yet undiscovered creature in rocks more than 60 million years older than Archaeopteryx, the first bird to have left fossils of its body parts.

  6. Astronomy

    Pluto or bust?

    A new National Research Council report may revive plans to send a spacecraft to explore Pluto and its neighborhood.

  7. Health & Medicine

    Heart damage tied to immune reaction

    Researchers in Brazil have identified immune proteins that flood the heart tissues of many people with Chagas disease, suggesting a cause of this deadly complication of the parasitic tropical disease.

  8. Physics

    Law and Disorder: Chance fluctuations can rule the nanorealm

    A tug-of-war in a water droplet demonstrates that random fluctuations wield more than enough muscle to give nanoscale machines trouble.

  9. Paleontology

    Bone Crushers: Teeth reveal changing times in the Pleistocene

    Tooth-fracture incidence among dire wolves in the fossil record can indicate how much bone the carnivores crunched and, therefore, something about the ecology of their time.

  10. Astronomy

    Moveable Feast: Milky Way dines on its neighbors

    Astronomers have found new evidence that the Milky Way is a cannibal, devouring streams of stars from its nearest galactic neighbors.

  11. Earth

    A Stinging Forecast: Model predicts chance of encountering jellyfish

    Weather forecasters usually prognosticate precipitation, pollen, and poor air quality, but in some areas, they could soon provide beachgoers with the probability of confronting a jellyfish.

  12. Staying Alive with Attitude: Beliefs about aging sway seniors’ survival

    In a small Ohio town, people aged 50 and over who reported a positive outlook on aging lived about 7½ years longer than those who held negative views about getting older.

  13. Chemistry

    Mimicking the Best of Nature’s Binders: New technique produces artificial receptors

    Scientists have devised a new way to make artificial receptors that differentiate among similar molecules.

  14. Health & Medicine

    For Failing Hearts: Gene therapy stops decline in animals

    Tests in hamsters have raised hopes for creating a gene therapy to stop the common downward spiral of chronic heart failure.

  15. Earth

    Monsoon Warning: Data hint at wet and blustery future

    Asian monsoons have been intensifying over the last 400 years, and they're slated to get worse.

  16. Ecosystems

    Making Scents of Flowers

    Science gets the tools to start sniffing around the ecology of floral scent.

  17. Men of Prey

    Scientists have started to uncover the roots of rape and child molesting, although questions remain about whether it's possible to identify who will be a repeat sex offender or to provide effective treatment for such behavior.