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The Hadza people of Tanzania wore wristwatches with GPS trackers that followed their movements while hunting or foraging. Data showed that humans join a variety of other species including sharks and honeybees in using a Lévy walk pattern while foraging. (Photo by Brian Wood/Yale University) The Hadza people of Tanzania wore wristwatches with GPS trackers that followed their movements while hunting or foraging. Data showed that humans join a variety of other species including sharks and honeybees in using a Lévy walk pattern while foraging.