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  1. Trilobites might have invented farming

    A close look at fossils raises the possibility that a type of trilobite farmed bacteria.

    By Susan Milius

  2. Weevils pick on someone their own size

    A horned weevil can't pick a real fight with a male too big for him because the bigger one can't get a good grip.

    By Susan Milius

  3. Why is that wasp helping?

    Researchers have found nests of a social insect with helpers that are neither close kin nor slaves.

    By Susan Milius

  4. Energy-efficient brains

    Successful problem solving depends on a brain that efficiently lessens its workload rather than laboring harder.

    By Bruce Bower

  5. 19222

    I offer no defense of the sex offenders described in your article.