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  1. Mechanism suggested for Guam illness

    A research team has invoked protein chemistry to propose a solution to a long-standing neuroscience mystery in Guam.

    By Susan Milius
  2. Planetary Science

    The sound of rings

    When Cassini reached Saturn on June 30, it twice dashed through a gap in the planet's rings, and onboard science instruments recorded a flurry of ring dust harmlessly striking the spacecraft.

    By Ron Cowen
  3. Health & Medicine

    HIV drugs may stop cervical disease

    A drug combination given to people with HIV, the AIDS virus, helps knock out precancerous cervical lesions in some women.

    By Nathan Seppa
  4. Planetary Science

    Meteorites quickly reach Earth

    Fragments from collisions between large bodies in the asteroid belt can reach Earth in as little as 100,000 years.