News

  1. Astronomy

    New Solar System? Twelve planets and counting (Updated)

    According to a new proposal, the solar system has 12 planets instead of the familiar 9, with several dozen more to come.

    By Ron Cowen
  2. Chemistry

    Mulch matters

    Mulch made from recycled construction and demolition wood can release arsenic into the environment.

    By Aimee Cunningham
  3. Earth

    Grand Canyon fish seem to be rebounding

    The population of humpback chub, an endangered fish found only in the Colorado River and its tributaries, may be stabilizing in some sections of the Grand Canyon.

    By Sid Perkins
  4. Animals

    Seabirds take record summer vacations

    Sooty shearwaters that breed in New Zealand have set a new record for off-season travel, covering 64,000 kilometers between visits to their mating ground.