In 1973, a horse named Secretariat became a legend in his time. Not only did Secretariat win the Triple Crown of Thoroughbred Racing, but he did it with an unprecedented performance. At the Belmont Stakes, he not only won the race by 31 lengths, but he set new records along the way as he went faster with each phase of the run. For one-and-one-half miles, that famous thoroughbred ran faster every second. Secretariat was accelerating at such an incredible pace that his trainer noted if the race had been extended another lap, his heart would have literally exploded.