News

  1. Earth

    It’s a Gas: Trees emit unknown volatile substances

    The chemical reactions taking place just above a northern Michigan forest hint that trees there and elsewhere may be emitting highly reactive gaseous substances that scientists haven't yet identified or directly detected.

    By Sid Perkins
  2. Humans

    Mouse Mourned: Yoda dies at age 4

    An age-defying laboratory mouse known as Yoda died peacefully in his cage in Ann Arbor, Mich., on April 22, at the age of 4 years and 12 days.

    By Ben Harder
  3. Health & Medicine

    Unsettling Association: Dental X rays linked to low-birth-weight babies

    Getting dental X rays while pregnant might increase a woman's risk of giving birth to a low-birth-weight baby.