Uncategorized

  1. Math

    Detangling DNA

    DNA can form some very nasty knots — but not just any knots.

    By Julie Rehmeyer
  2. Animals

    How they shine

    Iridescence could be pretty meaningful—or maybe just pretty.

    By Susan Milius
  3. Astronomy

    When Worlds Collide

    Parallel universes aren’t supposed to be observable, but a cosmic crash might leave a visible sign of their existence.

    By Diana Steele
  4. Earth

    Audubon’s insect cafeteria

    Sidebar: Insects.

    By Janet Raloff
  5. Health & Medicine

    Insects (the original white meat)

    Dining on insects, usually more by choice than necessity, occurs in at least 100 countries — and may be better than chicken for both people and the environment.