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Nature
Alligator Versus Python
Alligators were once the undisputed reptile kings of the Everglades. But who would win a battle now -- alligator or python? It all depends on which one is bigger. "Invasion of the Giant Pythons" premieres Sunday, February 21, 2010 on PBS.
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53:56
Horseshoe crab numbers drop as their use as bait by the fishing industry increases.
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52:58
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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52:59
No spider can escape the tireless pursuit of Martin Nicholas.
