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  1. Animals

    Flex That Bill: Hummingbirds’ surprising insect-catching style

    High-speed videos of hummingbirds catching insects reveal that their lower bills are unexpectedly flexible.

    By Susan Milius
  2. Health & Medicine

    Save the Brain: Study suggests new way to treat head trauma

    A compound that stimulates nerve-cell activity may help the brain recover from serious head injuries.

    By John Travis
  3. Chemistry

    Molecular Midwives: Small helper compounds may have spawned early tools of life on Earth

    Life on Earth may have sprung into being with the assistance of tiny molecules that are remarkably adept at stitching together DNA in the lab.

    By Alexandra Goho
  4. Planetary Science

    Martian Methane: Carbon compound hints at life

    The presence of methane in the Martian atmosphere spotlights the possibility that there might be primitive life on the Red Planet.