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  1. Astronomy

    Astronomy: Man Bites Dog; Planet heats its star

    Observing a sunlike star 90 light-years from Earth, astronomers have found evidence of a closely orbiting planet heating its star.

    By Ron Cowen
  2. Health & Medicine

    Clear Airways: Quelling a protein stops mucus overload

    By interfering with a protein that earlier research implicated in mucus secretion, scientists have countered overstimulation of mucus secretion in the airways of mice.

    By Nathan Seppa
  3. Physics

    A Solid Like No Other: Frigid, solid helium streams like a liquid

    Frozen helium prepared in a laboratory has apparently transformed into a superfluid solid, or supersolid—a never-before-seen phase of matter that theorists predicted more than 30 years ago.