Vol. 157 No. #6
Archive Issues Modal Example

More Stories from the February 5, 2000 issue

  1. Humans

    Treaty Nears on Gene-Altered Exports

    In an effort to help preserve biodiversity, negotiators from 130 nations crafted rules of conduct for international trade in living, genetically engineered organisms.

  2. Anthropology

    Drowned land holds clue to first Americans

    A map of a now-flooded region charts the path that Asians may have taken to first reach the Americas.

  3. Physics

    Black hole recipe: Slow light, swirl atoms

    Whirling clouds of atoms may swallow light the way black holes do, possibly giving scientists a way to test the general theory of relativity in the lab, not just in outer space.

  4. Health & Medicine

    Novel diabetes strain has rapid onset

    Japanese researchers have confirmed that some patients with type 1 diabetes have a novel form of the disease that's not caused by immune cells attacking the pancreas.

  5. Earth

    DDT treatment turns male fish into mothers

    Injecting into fish eggs an estrogen-mimicking form of the pesticide DDT transforms genetically male medaka fish into apparent females able to lay eggs that produce young.

  6. Animals

    Bees log flight distances, train with maps

    After decades of work, scientists crack two problems of how bees navigate: reading bee odometers and mapping training flights.

  7. Astronomy

    Milky Way gets a new layer

    Astronomers propose that 150 billion corpses of sunlike stars may blanket the visible disk of the galaxy.

  8. Keys to expertise in the brain

    A brain region linked to face recognition may foster expertise at identifying items in any category a person strives to master.

  9. Dendrite decline in schizophrenia

    Cell connections in a part of the brain's frontal lobe appear to dwindle in people with schizophrenia.

  10. Plants

    Why tulips can’t dance

    An elliptical stem gives daffodils an unusual liveliness in the wind compared with tulips.

  11. Ecosystems

    Males live longer with all-year mating

    Male butterflies live longer in Madeira, where females are available year-round, than in Sweden, where females mature in one burst.

  12. Earth

    Just how much do U.S. roads matter?

    A Harvard researcher calculates that roads directly influence the ecology of a fifth of U.S. land area.

  13. Health & Medicine

    Lung cancer gene has gender bias

    The X chromosome's gastrin-releasing peptide receptor gene is turned on by nicotine to produce a protein that promotes lung cancer, a combination of factors that could explain why women are more susceptible to the disease than men are.

  14. Health & Medicine

    No worry that this secret will leak

    The recently discovered protein angiopoietin-1 appears to protect blood vessels from leaking, a finding with implications for research into diseases that involve swelling, such as arthritis and asthma.

  15. Materials Science

    Vision Quest

    Increasing numbers of people with less-than-perfect vision can now wear contact lenses, thanks to innovations in lens design and materials.

  16. Animals

    When Ants Squeak

    In the past 20 years, researchers studying sound communication in ants have discovered a sort of ant-ernet, zinging with messages about lost relatives, great food, free rides for hitchhikers, caterpillars in search of ant partners, and impending doom.