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Nature
Frogs: The Thin Green Line - Preview
Learn how large-scale die-offs of frogs around the world have prompted scientists to take desperate measures.
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50:01
The loneliest animals are the most endangered species on the planet.
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53:43
It is the greatest mass extinction since the dinosaurs.
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54:06
Kilauea, on Hawaii's Big Island, is the world's most active volcano.
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53:30
Relationships with cats and dogs are some of the longest and most intimate of our lives.
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53:47
In the Drakensberg Mountains of South Africa, eland make a remarkable journey of survival.
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53:23
Skunks seem to know their power as they navigate the margins of our world.
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52:55
Ancient maps and legends tell of dragons in our world. Where did these stories come from?
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51:14
In 1893, a bounty hunter journeyed to New Mexico on a mission to kill a dangerous outlaw.
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53:35
Male animals will stop at nothing for the right to mate with a female.
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53:35
The behavior of female animals.
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53:56
Horseshoe crab numbers drop as their use as bait by the fishing industry increases.
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53:30
The colors, behaviors and habitats of the parrots occupying Australia.