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  1. Life

    Genes jump more in one type of autism

    A mutation that causes Rett syndrome also increases the activity of retrotransposons in the brain.

    By Tina Hesman Saey
  2. Animals

    DEET of the sea

    Before turning in for the night, some reef-dwelling fish apply a slimy mucus shield to deter biting bugs.

    By Rachel Ehrenberg
  3. Health & Medicine

    Mining fat tissue for cardiac repair

    Stem cells that are abundant in adipose tissue seem to boost the recovery of heart tissues in people who survive the big one, early research shows.

    By Nathan Seppa
  4. Health & Medicine

    Jet lag makes hamsters dumb

    A new study highlights the perils of shifting time zones.