This story was originally published in 2016. Watch the 2018 Kentucky Derby live coverage on NBC Saturday beginning at 2:30 p.m. ET. Thoroughbreds are considered the fastest horses in the world and ...

4 The Friesian Tall stature, flowing mane, dark coat, and feathers around hooves. 5 The Appaloosa Recognizable spotted coat ...

This story was originally published in 2016. Watch the 2018 Kentucky Derby live coverage on NBC Saturday beginning at 2:30 p.m. ET. Thoroughbreds are considered the fastest horses in the world and ...