Vol. 161 No. #16
Archive Issues Modal Example

More Stories from the April 20, 2002 issue

  1. Earth

    Motion of ice across Lake Vostok revealed

    New measurements of the movement of the Antarctic ice sheet across a lake that harbors microbial life beneath 4 kilometers of ice could help scientists determine where to drill to get the freshest samples of frozen water without contaminating the lake.

  2. Health & Medicine

    Folate cuts family risk of colon cancer

    According to a 16-year study of nearly 90,000 women, the vitamin folate has a protective effect against colon cancer among women whose families have been affected by the disease.

  3. Animals

    Maneless lions live one guy per pride

    The male lions of Tsavo National Park don't grow manes but they're no wimps—they're the only male lions found so far that rule big prides of females alone, without help from some buddies.

  4. Health & Medicine

    Antibiotics don’t seem to protect heart

    Two large studies find little evidence that antibiotics can protect some people with cardiovascular disease against subsequent heart attacks.

  5. Health & Medicine

    St. John’s wort hinders cancer drug

    The herbal remedy St. John's wort can interfere with the effectiveness of the anticancer drug irinotecan.

  6. Health & Medicine

    Compound attacks pancreatic cancer

    A protein fragment dubbed NK4 can stall the development of pancreatic cancer in mice.

  7. Health & Medicine

    Gene mutation tied to lung cancer

    Scientists have identified a gene, dubbed LKB1/STK11, that is often mutated in people with a particularly deadly form of lung cancer.

  8. Health & Medicine

    Drug for dry mouth may prevent lung cancer

    A drug prescribed for a condition called dry mouth stymies formation of precancerous lung lesions in cigarette smokers.

  9. Earth

    Feminized Frogs: Herbicide disrupts sexual growth

    At concentrations currently found in water, the widely used weed killer atrazine hormonally strips male frogs of their masculinity and may be partly responsible for global amphibian declines.

  10. Paleontology

    Older Ancestors: Primate origins age in new analysis

    A controversial new statistical model concludes that the common ancestor of primates lived 81.5 million years ago, about 16 million years earlier than many paleontologists have estimated.

  11. Astronomy

    Cosmic Remodeling: Superwinds star in early universe

    New measurements reveal that some of the earliest galaxies in the universe produced winds so powerful and persistent that they blew material from one galaxy to another, temporarily separating dark matter from visible matter and profoundly influencing the evolution of future generations of galaxies.

  12. Health & Medicine

    Cardiac Culprit: Autopsies implicate C-reactive protein in fatal heart attacks

    Of people who died suddenly, those who succumbed to a heart attack had an abundance of the inflammation indicator C-reactive protein in the blood, even though few had had outward signs of heart problems.

  13. European Union for Ants: Supercolony reigns from Italy to Portugal

    European researchers have documented the largest ant supercolony yet, a network of cooperating nests that stretches from Italy to the Atlantic.

  14. Materials Science

    Membrane Mastery: Nanosize silica speeds up sieve

    A novel modification to polymer membranes gives researchers a means to tune certain filters so they separate molecules more quickly and more selectively.

  15. Animals

    Big-Eyed Birds Sing Early Songs: Dawn chorus explained

    Researchers report a strong relationship between eye size and the light intensity at which birds start to sing in the morning.

  16. Astronomy

    Strange Stars? Odd features hint at novel matter

    Two stellar corpses thought to be made of neutrons may actually contain weird forms of matter never observed before.

  17. Ecosystems

    Deprived of Darkness

    From anecdotal reports of little-studied phenomena, researchers suspect that artificial night lighting disrupts the physiology and behavior of nocturnal animals.

  18. Animals

    Wild Hair

    The technique of studying animals through genetic analysis of their fur gained fame with a political furor over lynx, but scientists have applied the technique to many other animals.