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  1. Humans

    Matt Crenson, Reconstructions

    Tools tell a more complicated tale of the origin of the human genus.

    By Science News
  2. 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
  3. 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
  4. 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.