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        Adolph Murie In Igloo Canyon | Ken Burns: The National Parks

        At Denali National Park, Murie, a park biologist, conducted the first in-depth study of wolves and concluded that they were essential to the ecological equilibrium of the area not the scourge many people, including Park Service personnel-considered them. His views would eventually prevail, and park policies began protecting predators rather than eliminating them. Source: Denali National Park.

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