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  1. Brain roots of music depreciation

    The brains of tone-deaf people may be unable to detect subtle shifts in pitch, which keeps them from learning the basic structure of musical passages.

    By Bruce Bower
  2. Earth

    Tracks of dust devils spotted from space

    Scientists scanning satellite images of the southern Sahara have detected trails left on the landscape by the whirlwinds commonly known as dust devils.

    By Sid Perkins

  3. Chronic vibrations constrict vessels

    Chronic vibrations of the hands can distort and twist some arterial cells to the breaking point, animal research indicates.

    By Janet Raloff

  4. Uganda shows strong gains in war on AIDS

    Uganda has shown remarkable progress against HIV, the AIDS virus.