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  1. Health & Medicine

    Unorthodox Strategy: New cancer vaccine may thwart melanoma

    In experiments on mice, destroying good skin cells can induce the immune system to kill cancerous versions of these cells.

    By Nathan Seppa
  2. Astronomy

    Cosmic Melody

    An astronomer has converted fluctuations in the density of the early universe—the seeds of the first galaxies and stars—into audible sound.

    By Ron Cowen
  3. Physics

    Antimatter loses again

    A study of subatomic B mesons reveals a new way in which the laws of physics differ for matter and antimatter, providing another clue to why there's almost no antimatter in the universe today.

    By Peter Weiss
  4. Planetary Science

    Finding a lunar meteorite’s home

    Scientists have for the first time pinpointed the source of a meteorite that came from the moon.