BOLT’S RECORD TESTS THEORIES OF HUMAN SPEED

As astonishing as Usain Bolt's record-breaking 100-meter sprint was, his time of 9.69 seconds is nowhere near what biostatisticians predict is the natural limit for the human body. But because he broke the mathematical model that had fit 100-meter record data for almost a century, Bolt's incredible performance could reset how fast researchers believe humans ultimately can run.