Feature

  1. Planetary Science

    Idiosyncratic Iapetus

    The strange appearance of Saturn's moon Iapetus suggests that it was frozen in shape soon after birth, providing a glimpse into conditions in the early solar system.

    By Ron Cowen
  2. Earth

    Hammered Saws

    Sawfish, shark relatives that almost went extinct several decades ago, have now gained protection by international treaty.

    By Janet Raloff
  3. Health & Medicine

    Taking a Jab at Cancer

    Vaccines that train a person's immune system to kill cancerous cells, when combined with drugs that block tumor defense mechanisms, are starting to show promise.

    By Patrick Barry
  4. Anthropology

    Red-Ape Stroll

    Wild orangutans regularly walk upright through the trees, raising the controversial possibility that the two-legged stance is not unique to hominids.