Why Horses Can't Wear Flip Flops

How in the world did horses get their hooves? What in the world is the difference between their feet and ours? And when in the world did tiny dog-sized horses roam the earth? Join Guy Raz and Mindy for a little trot through the latest Who, What, When, Where, Why, How and Wow in the world of horse hooves! *And be sure to check out this episodes conversation starters at www.wowintheworld.com! (originally aired November 20th)