It is widely known dogs evolved from wolves, but how did they become so friendly? Anderson Cooper meets with an evolutionary biologist and geneticist to find out. Sharyn Alfonsi visits the Wyoming Honor Farm, a state-run minimum-security prison in the middle of horse country doing its part to help with the wild horse population through a program where inmates train the horses.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.