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  1. Humans

    Science gets a start on the space station

    Although the space station's main laboratories have yet to be launched, scientists are already using nooks and crannies in the existing structure to conduct experiments in biotechnology and physics.

    By Ron Cowen

  2. Lamprey cyborg sees the light and responds

    Researchers have paired the brain of a sea lamprey with a small robot that can detect and move around in response to light.

    By Sid Perkins
  3. Health & Medicine

    Lithium increases gray matter in the brain

    Used for decades to treat manic depression, lithium may stimulate the production of new brain cells, thus raising hope that it can treat strokes, Alzheimer's disease, and other conditions that kill brain cells.