Tame silver foxes are the result of about 50 years of Russian experiments to domesticate the silver morph of the red fox. Scientist Dmitri Belyaev began the project to test his theory that the key to domestication is behavior—not size or reproduction—and did so by breeding the least aggressive foxes in each generation. The resulting tame foxes possess a temperament that differs fundamentally from that of their wild forebears. Interestingly, the breeding also resulted in what physical changes? Discuss
Source: The Free Dictionary