News

  1. Tech

    Columbia Disaster Working Hypothesis: Wing hit by debris

    The independent board investigating the breakup of the space shuttle presented its first detailed account of what might have caused the Feb. 1 disaster.

    By Ron Cowen
  2. Earth

    Going Down? Probe could ride to Earth’s core in a mass of molten iron

    A geophysicist suggests that scientists could explore Earth's inner structure by sending a grapefruit-size probe on a week-long mission to the Earth's core inside a crust-busting mass of molten iron.

    By Sid Perkins
  3. Anthropology

    Stone Age Genetics: Ancient DNA enters humanity’s heritage

    Genetic material extracted from the bones of European Stone Age Homo sapiens, sometimes called Cro-Magnons, bolsters the theory that people evolved independently of Neandertals.