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Cat breeding has become a multi-billion dollar business around the world, with breeders constantly competing to create exotic new varieties that might win the blue ribbon at the next pet show.
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The selective breeding that created the hundreds of modern dog breeds has put purebred dogs at risk for a large number of health problems, affecting both body and behavior.
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Genetics and brain physiology can affect a dog's personality and behavior.
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Clips from the NATURE episode "Holy Cow!" show the cow's digestive system and illustrate other naturally evolved and artificially selected traits of cattle.
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This video-enhanced lesson focuses on how and why humans have been so successful in selectively breeding cattle to suit our needs, while also exploring the limitations and consequences of this success. (Grades 9-12)
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The behavior of dogs is shaped in part by instinct that is selectively bred. View photos of popular dog breeds and learn about their hard-wired behaviors.
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Discover Panda breeding habits with this interactive feature.
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During the 20th century, as humans have encroached more and more on animals' territory, zoos have come to be more than just places to view wild animals.
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Major corporate support for Nature is provided by SC Johnson, Canon, CPB.
