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.
Summary: 1  The American Pitbull Terrier and the American Staffordshire Terrier both belong to the molesser breed group. 2  The Pitbull is taller, heavier and more muscular than the Amstaff. 3  Pitbulls are known to be passionate, aggressive, and physically powerful.  Some pitbulls today are used as police and therapy dogs.