Feature

  1. 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
  2. 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.

    By Bruce Bower
  3. Earth

    Signs of Life?

    Life's effects on a planet's terrain show up only in surprisingly subtle ways.

    By Sid Perkins
  4. Computing

    Virtual Surgery

    Computer simulations of blood flow in the heart allow doctors to test surgical innovations before trying them on patients.