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  1. Earth

    Volcanic Legacy: Tortoises chronicle eruption in their genes

    An ancient volcanic eruption in the Galápagos Islands left its legacy in the diminished genetic diversity of one subspecies of the archipelago's famed giant tortoises.

    By Sid Perkins
  2. Animals

    Carnivores in Captivity: Size of range in wild may predict risk in zoo

    A survey of zoo reports of troubled animals suggests that the minimum size of a species' range predicts how well it will adapt to captivity.

    By Susan Milius
  3. Health & Medicine

    One bug’s bane may be another’s break

    People who carry pneumococcus bacteria in their nasal passages may be partially protected against having their noses colonized by Staphylococcus aureus.