In physics, escape velocity is the minimum speed needed for an object to break free from the gravitational attraction of a massive body. The escape velocity from earth is about 40,270 km/h (25,020 mph).
Staffordshire Bull Terriers. American Bully. The American Bully was recognized as a breed by the United Kennel Club (UKC) in the summer of 2013. It first appeared in the 1990s and was created by crossing American Pit Bull Terriers, American Staffordshire Terriers, and other breeds.
Unlike the American Bulldog, a breed now disassociated from aggression, the Pit Bull moved from bull baiting to dog fighting and was originally recognized as a breed because of the sport. The American Bulldog became nearly extinct until the breed was revived and finally recognized by the United Kennel Club in 1999.