As much as speed is everything in horse racing, so is slipstreaming. Also known as drafting, slipstreaming is a riding technique in which jockeys run their horses behind or alongside another horse to reduce aerodynamic drag. Slipstreaming saves a horse’s vital energy for that last dash to the finish line. It is a technique used in many speed and distance sports such as speed skating and cycling to save an athlete’s power and energy. Now some fascinating science has shown just how precisely different racing positions reduce drag during a race.