Feature

  1. Ecosystems

    Brave Old World

    If one group of conservation biologists has its way, lions, cheetahs, elephants, and other animals that went extinct in the western United States up to 13,000 years ago might be coming home.

    By Eric Jaffe
  2. Health & Medicine

    The Antibiotic Vitamin

    Because vitamin D turns on a major germ killer in the body, a deficiency in the nutrient may leave people especially vulnerable to infections.

    By Janet Raloff
  3. Humans

    Ballot Roulette

    In the midst of rapid change in voting technology, researchers are finding causes for concern as well as inventing new equipment and schemes to improve the accuracy and integrity of elections.

    By Peter Weiss
  4. Health & Medicine

    The Cancer of Dorian Gray

    By studying mice that have been engineered to carry mutations in certain tumor-suppressing genes, researchers have identified a link between cancer and aging.