Greyhound, can reach a top speed of 72 km/h. Usain Bolt, is the fastest human being in history. The great Olympian can reach a top speed of 44 km/h. #GreyhoundRacing #TrackRace #DogRacing #AmericanRacing #AnimalsRacing #GreyhoundDerby #LoveTheDogs #FastestDog #UsaiBolt #GreyhoundSpeed Source

Greyhound racing – distance 515 metres
Greyhound, can reach a top speed of 72 km/h. Usain Bolt, is the fastest human being in history. The great Olympian can reach a top speed of 44 km/h. #GreyhoundRacing #TrackRace #DogRacing #AmericanRacing #AnimalsRacing #GreyhoundDerby #LoveTheDogs #FastestDog #UsaiBolt #GreyhoundSpeed Source