From www.saultstar.com:

Some challenges present a pack of problems. 
Even more so when they concern a relatively unknown, remote island where animals are moving pieces on nature’s chessboard. On Lake Superior’s Michipicoten Island, a large, healthy wolf pack is encroaching on the territory of the most southern herd of caribou in the world. And without help, there soon could be a checkmate in store for all of them.

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