A Dog's Nose Always Knows

What in the world is a dog's secret sniffing power? How in the world do their noses know more than ours? And why are we putting these noses to work? Join Guy Raz and Mindy Thomas as they explore latest Who, What, When, Where, Why, How, and Wow in the world of super sniffing canines See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.