News

  1. IQ Yo-Yo: Test changes alter retardation diagnoses

    Mental retardation placements in U.S. schools rose dramatically in the first five years after a commonly used IQ test was revised, raising concerns about how IQ scores are used to diagnose mental retardation.

    By Bruce Bower
  2. Astronomy

    Vanishing planet

    An object orbiting a distant star is too heavy to be a planet, researchers have concluded.

    By Ron Cowen
  3. Astronomy

    Extrasolar planet gets heavier

    An extrasolar planet that tightly orbits its parent star is heavier than astronomers had thought.

    By Ron Cowen
  4. Health & Medicine

    Treatment helps newborns avoid HIV

    Giving healthy newborns whose mothers are infected with HIV a combination of anti-HIV drugs shortly after birth makes the infants less likely to contract the virus through breastfeeding.