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Andrew Sorensen

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Wolves crossing the ice during an Isle Royale winter.

Rolf Peterson

The Death and Life of an Isle Royale Wolf

Running for her life, the lone wolf flees into the cold waters of Lake Superior, where she is surrounded by 11 wolves from Middle Pack. more »

Feb 1, 2008 Natural World

Wolves from the Middle Pack are on the move at dawn. Wolves walk an average of 30 miles a day looking for food.

John Vucetich

Isle Royale's Wolves and Moose: The Bloody Balance

A 50-year study tracks the swinging pendulum that is the relationship between Isle Royale's wolves and moose. For 38 of those years, Rolf and Candy Peterson have worked at the greatest laboratory of predator vs. prey in the world. more »

Feb 1, 2008 Natural World