Feature

  1. Math

    All Square

    Mathematicians nail down when it's possible to express numbers as the sums of squares.

    By Ivars Peterson
  2. Ecosystems

    Saving Sturgeon

    Sturgeon species around the world are in trouble, which is why humans will increasingly be stepping in to give them a big assist.

    By Janet Raloff

  3. Eat Smart

    Your daily diet may have an impact on your brain's resiliency in the face of injury or disease.

    By Christen Brownlee

  4. Buff and Brainy

    Physical exercise encourages brains to function at an optimum level, even if they're damaged or diseased.

    By Christen Brownlee
  5. Humans

    Evolution in Action

    Debates on the conflict between evolution and intelligent design are taking place not only in the courts but also in state legislatures and even among members of local school boards, where topics include curricula, textbooks, and the definition of science itself.