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One of the biggest and rarest, living reptiles on earth, the black caiman.
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A mother zebra and her son's treacherous migration through East Africa and across the Mara River.
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Fatal shark attacks in South Africa.
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Three years in the lives of two grizzly bears in Yellowstone National Park.
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Colonel Jack Oliver turkey hunts in Tennessee.
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How grassland animals such as the American Bison survive the extreme weather and rugged conditions of the Great Plains.
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The titanoboa is considered by scientists to be the largest snake ever discovered.