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Nature
Newt Mating in the High Sierra | Yosemite Web Exclusive
Sierra newts spend most of their lives on land, in the moist parts of the forest, but once a year they return to their place of birth to seek out a mate. The minute she enters the water, males are upon her in an instant and the competition is fierce.
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The explosion of dog types into the roughly 400 breeds and dogs' role in medical care.
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52:59
This film explores how the domestication of dogs might have taken place.
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No spider can escape the tireless pursuit of Martin Nicholas.
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54:19
It's one of the most brutal environments on Earth - so how does life carry on here?