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    ScienceShot: Worms Are Divided After All

    It turns out that worms really are deeply divided. In the mid-19th century, French naturalist Armand de Quatrefages split worms into wigglers—which crawl and swim to their hearts' content, such as the marine ragworm— and the more sedentary, typically tube-dwelling nonwigglers, such as the earthworm.

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