Feature

  1. Earth

    Greenhouse Gassed

    Scientists are discovering that more carbon dioxide in the air could spell disaster for plants and the animals that love to eat them.

    By Tina Hesman Saey
  2. Tech

    Looking for Mr. Goodoxide

    The impending collapse of a 40-year union between the electronic wonder materials silicon and silicon dioxide threatens the advance of chip technology and propels a high-stakes search for silicon dioxide replacements.

    By Peter Weiss
  3. Health & Medicine

    Chocolate Hearts

    Preliminary studies indicate that moderate consumption of chocolate products may offer cardiovascular benefits.

    By Janet Raloff
  4. Chemistry

    Molecules Leave Their Mark

    A material etched with tiny, carefully shaped pores can act like an artificial enzyme, cell membrane, or receptor.