News

  1. For geneticists, interference becomes an asset

    A new method of disrupting genes, called RNA interference, works in mouse cells.

    By John Travis
  2. Astronomy

    X-ray Data Reveal Black Holes Galore

    Using a sensitive, new X-ray telescope, astronomers have identified the origin of the high-energy part of the X-ray background and found that supermassive black holes at the cores of galaxies are far more numerous than visible-light surveys indicate.

    By Ron Cowen
  3. Humans

    Solar series wins award for Science News

    The Solar Physics Division of the American Astronomical Society has given its 2002 popular writing award to Ron Cowen and Sid Perkins for a two-part series on cyclic variations in the sun's activity.