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

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credit: TreeHugger

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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