Meet the oldest known purebred dog in the world – the Greyhound. These speedy guys can be recognized in early artistic rendering, on temple walls and the Bible. Cynthia Branigan,The DiscoveryStore.com'sGreyhound historian and author of "The Reign of the Greyhound," tells us about Greyhounds in Ancient Egypt, Rome and Greece. A look at modern day Greyhounds takes place at Derby Lane in St. Petersburg, Florida to explore the racing side of this beautiful hound. John Silipelli gives a tour "behind the scenes" to view the competitor's mealtime, pre-race preparation, race procedures and post race relaxation and rewards.