Greyhound: Canine Blur!

The greyhound is the fastest dog in the world. It can run at a speed of up to 40 miles per hour (64 kph)-that's almost twice as fast as a human can run. Look inside to find out more about this speedy canine, including where it was first bred, why it was so helpful to hunters, and the special ways its body helps it reach its record-breaking speeds.