Feature

  1. Life

    Year in Review: Gift of steroids keeps on giving

    Mouse muscles stay juiced long after doping ends.

    By Tina Hesman Saey
  2. Animals

    Year in Review: Odd cicada history emerges

    Brood II returns better understood.

    By Susan Milius
  3. Astronomy

    Year in Review: Visitor from the Oort cloud

    A visitor from the outer solar system flies past the sun.

    By Gabriel Popkin
  4. Math

    Year in Review: Progress made toward twin prime proof

    A surprising advance sparks a flurry of work on the mathematical conjecture.

    By Dana Mackenzie
  5. Anthropology

    Year in Review: Slain king’s bones dug up

    The king’s skeleton reveals fatal wounds.