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  1. Animals

    When rare species eat endangered ones

    To cut down on their salmon smolt catch, Caspian terns were encouraged to move from one island to another in the Columbia River.

    By Susan Milius
  2. Animals

    Oops. New feathers turn out lousy

    Going to the trouble of molting doesn't really get rid of a bird's lice after all.

    By Susan Milius
  3. Animals

    Stinking decorations protect nests

    The common waxbill's habit of adorning its nests with fur plucked from carnivore scat turns out to discourage attacks from predators.

    By Susan Milius

  4. From the August 29, 1931, issue

    HUGE GENERATORS YIELD BEAUTY TO PHOTOGRAPHER Throbbing electric generators, the machines that are the heart of the great system supplying light and power to more than 120 millions, are odd and beautiful subjects for the talented photographer.