Animal domestication was a major prerequisite for human civilization to evolve. Join National Geographic as we explore how a dramatic shift from wild to tame happened by investigating foxes, chickens, dogs and rats. Travel to Siberia to see how the physiology of foxes changes when only friendly foxes are bred. In Georgia, follow a scientist as he decodes the DNA of a special population of chickens. And in Moscow, a researcher gains insight into domestication by studying a group of stray dogs.