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  1. Big Oil, Tiny Barons: Microbes can unleash trapped petroleum

    Specialized microbes can lift trapped oil from wells long gone dry.

    By Christen Brownlee
  2. Health & Medicine

    For the Birds: New vaccines protect chickens from avian flu

    By piggybacking components of strains of avian-influenza virus onto an existing poultry vaccine, scientists have created experimental vaccines that can prevent bird flu in chickens.

    By Nathan Seppa
  3. Health & Medicine

    Open Water, Open Mouths: Scuba divers face infection risks

    A new study takes a stab at quantifying the risks that waterborne bacteria and viruses pose to scuba divers.

    By Ben Harder
  4. Ecosystems

    Top-Down Lowdown: Predators shape coastal ecosystem

    The health of southern California kelp forests may depend more on the ecosystem's predator population than the forest's access to nutrients.