Uncategorized

  1. Earth

    Fabulon: Looking less fabulous

    The source of polychlorinated biphenyls found heavily tainting some homes—and their dwellers—appears to be a durable topcoat for hardwood floors that was widely used a half-century ago.

    By Janet Raloff
  2. Math

    Getting Old, Faster and Faster

    The world population is aging fast, but is still younger than we tend to think.

    By Julie Rehmeyer
  3. Materials Science

    Fishy flash

    Fish alter the growth of crystals in their skin, making it supershiny.

    By Rachel Ehrenberg
  4. Tech

    Smells like DNA

    By reshuffling the chemical letters of the genetic code, scientists have made short strands of DNA that can distinguish several different smells, such as explosives and food preservatives.