Season 4 Episodes19
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In the winter of 1976-77, 80 percent of the wolf population in Northwest Alaska was the target of aerial hunts. Although the area is roamed by the Western Arctic caribou herds—a natural predator of the wolf—the caribou population has been steadily decreasing in number. NOVA
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"The Wolf Equation" is episode 11 of NOVA season 4. It aired on March 30, 1977.