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Grizzly Bears, Guanacos, Beetles

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Grizzly bears can charge at over 30 miles per hour and bite with enough force to crush a bowling ball.  Their strength and speed is thanks to a 1000 lb. body packed with muscle concentrated in their shoulders, hump and buttocks.

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From a grizzly bear's audacious robbery gone bad, to a starling defending her home to the death, the contenders range from the massive to the miniature, all fighting to stay alive.

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