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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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How grassland animals such as the American Bison survive the extreme weather and rugged conditions of the Great Plains.
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Frightening stories from fishermen and sailors suggest the mythical creature known as the kraken may be all too real.
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Bengal tiger attacks in Eastern India.
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Arctic predators endure harsh conditions as they struggle to survive.
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A power struggle between the males of an elephant herd.