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  1. Whatever that is, it’s scary

    Tammar wallabies that have lived away from mammalian predators for more than 9,000 years still seem to recognize the appearance of danger.

    By Susan Milius

  2. Kookaburra sibling rivalry gets rough

    The youngest kookaburra in the nest doesn't have a lot to laugh about.

    By Susan Milius
  3. Astronomy

    Gang of four: Debut of a big telescope

    In the desert of northern Chile, a fourth 8.2-meter telescope opened for business, completing a quartet known as the Very Large Telescope.

    By Ron Cowen
  4. Astronomy

    Stellar motions provide hole-y data

    Measuring for the first time the acceleration of stars near the dense core of our galaxy, astronomers have obtained more precise information on the location and density of the black hole that lurks there.