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  1. Earth

    Algae do battle with bioweaponry

    Beneath the frozen surface of Sweden's lakes, algae wage wars over nutrients, and one combatant apparently prevails by releasing chemicals toxic to its adversaries.

    By Ben Harder
  2. Health & Medicine

    The Persistent Problem of Cystic Fibrosis

    Ten years after the discovery of the gene that, when mutated, causes cystic fibrosis, researchers are still struggling to understand why deadly lung infections are so common among people with the disease.

    By Damaris Christensen
  3. Computing

    Calculating Cartoons

    Thanks to sophisticated computer simulations of the laws of physics, spectacular special effects—plus a zoo of strange but real-looking creatures—increasingly enliven movie screens and computer-game consoles.

    By Peter Weiss
  4. Plants

    Shower power: Raindrops shoot seeds out with a splat

    In a seed-dispersal mechanism scientists have never seen before in flowering plants, rain plops into a capsule and makes seeds shoot out the corners.