It’s no secret that horses can run at pretty impressive speeds. We’ve all watched in awe as they gallop around the track at the Grand National. Wondering whether it is their legs, lung capacity, or the jockey on their back that makes them a force to be reckoned with. The truth is it is the science behind the horse that makes it so fast. Each and every part of its anatomy, working together in perfect harmony, that drives it to victory. If even one thing was different, racehorses may not be such an impressive specimen to behold.