News

  1. Animals

    Biologists aflutter over just where monarchs are declining

    Citizen science data fuel debate over whether weed control ruined monarch habitat and whether the butterflies are failing to reach their Mexican winter refuge.

    By Susan Milius
  2. Psychology

    Decision tree for soldiers could reduce civilian deaths

    A new, three-part decision formula may help soldiers save civilians’ lives.

    By Bruce Bower
  3. Astronomy

    Young black holes evade detection

    Supermassive black holes should be growing in the first billion or so years after the Big Bang, but astronomers can’t find them.

    By Christopher Crockett
  4. Animals

    Power of pupils is in their shape

    Horizontally or vertically stretched pupils may provide predators and prey with visual advantages.