Unbelievable! 10 Black Track Stars Who Defy Physics in Spectacular Ways! In the world of track and field, the regular athletes, the superstars and the Greatest of all time like usain bolt, Grifith Joyner have records that remain unbroken. They're like the unicorns of of track and field, untouchable and the best the world have ever seen. Here are the 9 Black Track Stars Who Defy Physics in Spectacular Ways