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Nature | Dogs That Changed the World (Part 2) - Preview

Dogs That Changed the World (Part 2) - Preview

Details the explosion of dog types into the roughly 400 breeds known today and outlines dogs' potential role in medical care for human beings. (Part 2 of 2) 10/9/2011

Premiere Date: October 9, 2011 | Runtime: 00:00:30

Season Season 37

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NATURE brings the beauty and wonder of the natural world into your home, becoming in the process the benchmark of natural history programs.