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  • Nature

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

Duration: 00:31
Program: Nature #2412
Broadcast Date: Oct. 9, 2011

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

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Post Date: September 27, 2011