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  1. Health & Medicine

    Viruses depend on shocking proteins

    To replicate within a cell, a bird virus must force the cell to make certain proteins.

    By John Travis
  2. Health & Medicine

    Drugs slow aging in worms

    Drugs that defuse so-called free radicals lengthen a worm's life span by more than 50 percent.

    By John Travis

  3. 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

  4. Kookaburra sibling rivalry gets rough

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

    By Susan Milius
  5. Astronomy

    Gang of four: Debut of a big telescope

    In the desert of northern Chile, a fourth 8.2-meter