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Study Finds Bow and Arrow Swept Western North America 1,400 Years Ago  Ground NewsThe adoption of the bow and arrow in western North America  EurekAlert!1,400 Years Ago, the Bow and Arrow Took Over Western North America —Reshaping Hunting Traditions  Discover MagazineThe Bow Arrived Everywhere at Once, but Only Half of Hunters Ditched the Atlatl  ScienceBlog.com