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Nature
Watch a Protective Mother Hippo Guard Her Baby
Weighing only 4% as much as an adult, a baby hippo is completely dependent on its mother. The pair stays isolated from the rest of the pod, allowing the calf to imprint on his mother and for the two to forge a vital bond.
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It is the greatest mass extinction since the dinosaurs.
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Kilauea, on Hawaii's Big Island, is the world's most active volcano.
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Relationships with cats and dogs are some of the longest and most intimate of our lives.
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In the Drakensberg Mountains of South Africa, eland make a remarkable journey of survival.
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Skunks seem to know their power as they navigate the margins of our world.
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Ancient maps and legends tell of dragons in our world. Where did these stories come from?
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In 1893, a bounty hunter journeyed to New Mexico on a mission to kill a dangerous outlaw.
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Male animals will stop at nothing for the right to mate with a female.
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The behavior of female animals.
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Horseshoe crab numbers drop as their use as bait by the fishing industry increases.
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The colors, behaviors and habitats of the parrots occupying Australia.
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53:47
This is the three-year story of the most famous wolf pack in America.