Jockeys and horses take to the track this Saturday for the Kentucky Derby, which is often called the “most exciting two minutes in sports.” Each year, 20 horses run in the Derby -- and on to a chance at the Triple Crown. The winners of all the major prep races are expected to start this year, so we’re in for an exciting race. What makes a Derby winner, you might ask? Bet you couldn’t have guessed that there’s a STEM answer to that . . . so, let’s look into the science behind horse racing.