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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 and not the scourge that 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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