News

  1. Physics

    After 40-year prep, gravity test soars

    The Gravity Probe B satellite, which was built to test aspects of general relativity, finally hurtled into space.

    By Peter Weiss
  2. Astronomy

    Closing In on a Monster: A black hole’s dusty environs show themselves

    The first clear picture of the immediate surroundings of a supermassive black hole confirms that these gravitational monsters hide behind thick belts of dust.

    By Ron Cowen
  3. Health & Medicine

    Cord Blood to the Rescue: Infusions help babies with Hurler’s syndrome

    Umbilical cord blood transplants boost overall health and survival in patients with the rare hereditary condition called Hurler's syndrome.

    By Nathan Seppa
  4. Materials Science

    Next High-Tech Polishing Fluid: Tea—A new brew for the computer industry

    A concoction based on green tea may speed up manufacturing of precision components for computer hard-disk drives while reducing toxic wastes.