Uncategorized

  1. Math

    Proof clarifies a map-folding problem

    Researchers have developed an efficient algorithm to determine, given a collection of creases on a piece of paper, whether a sequence of simple folds produces a flat result, like a folded road map.

    By Ivars Peterson
  2. Animals

    Birds may inherit their taste for the town

    Tests switching cliff swallow nestlings to colonies of different sizes suggest the birds inherit their preference for group size.

    By Susan Milius
  3. Health & Medicine

    Drugs counteract irritable bowel syndrome

    Antibiotics can knock out bacteria overload in the small intestine, temporarily reversing irritable bowel syndrome.

    By Nathan Seppa
  4. Earth

    Salmon puzzle: Why did males turn female?

    Most of the spawning female Chinook salmon in one part of the Columbia River appear to have started life as males.