The Week in Animal News: The Wildest Stories of 2011, Polar Bears Turn to Cannibalism, and More

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credit: TreeHugger

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As we near the end of 2011, we count down the year's craziest stories in the animal kingdom, from shocking mass deaths to the return of the wooly mammoth.

We also have a disturbing trend among polar bears, the mutating effects of nuclear power on insects, the lone wolf's return to California, and more in the Week in Animal News.

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