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  1. Health & Medicine

    Coffee delivers jolt deep in the brain

    Caffeine strengthens electrical signals in a portion of the hippocampus, a study in rats finds.

    By Laura Sanders
  2. Humans

    Two feet or four, software is the same

    All walking animals use the same basic nerve patterns to put one leg in front of the other(s).

    By Nick Bascom
  3. Psychology

    Babies may benefit from moms’ lasting melancholy

    Fetuses pick up on maternal depression and thrive after birth if mothers don’t get better, a new study suggests.

    By Bruce Bower

  4. Nemesis: Searching for the sun’s deadly companion star

    Read the full article (PDF) | Vote on future topic | Search archives September 1, 1984 | Vol.