News

  1. Earth

    Mapping watersheds invites comparisons

    Computerized maps of environmental features for 154 of the largest river watersheds will soon be available to the public, free of charge.

    By Janet Raloff
  2. Health & Medicine

    Microbicide thwarts AIDS virus in monkey test

    A microbicidal gel applied vaginally prevents some transmission of the AIDS virus in monkeys.

    By Nathan Seppa

  3. Virus boosts fat in chickens and mice

    Injecting mice and chickens with a type of adenovirus that causes colds in humans led to higher body fat, though not higher body weight, and researchers point to indirect evidence for a role for the virus in human obesity as well.

    By Ruth Bennett
  4. Earth

    Lack of spring snowpack bodes ill for many

    NASA satellite images released last week confirmed that the northern United States had much less snow cover than normal this spring, following North America's warmest winter on record.