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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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53:31
NATURE follows an extraordinary stallion, whose life has been recorded since his birth.
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53:49
The influence the sun and moon have on the seasons and the tides.
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47:52
Dogs aid the disabled, do dangerous military work, find humans buried by avalanches
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54:19
Researchers and filmmakers produce the first comprehensive film chronicle of the jaguar.
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55:02
The walls of ice in Glacier Bay surround the most beautiful sights Alaska has to offer.