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In the time of Lewis and Clark, wolves were abundant throughout North America from the Arctic regions to Mexico. But man declared war on this cunning and powerful animal when cattle replaced the buffalo on the western plains, reducing the wolf's range to those few areas in the Far North where economic necessity did not call for its extinction.

Between 1939 and 1941, Adolph Murie, one of North America's greatest naturalists, made a field study of the relationship between wolves and Dall sheep in Mount McKinley National Park (since renamed Denali National Park) which has come to be...

For 25 years, Adolph Murie, one of North America's greatest naturalists, spent his summers in Mount McKinley National Park (since renamed Denali National Park) tracking, recording, and interpreting the lives of grizzlies in one of their few remaining strongholds.