Humans Keep Getting Faster; Why Not Horses?
In a fifty-year span, the four-minute mile went from a human milestone to a starting point for elite runners. The record for the mile has dropped a whopping 17 seconds since Roger Bannister first broke four minutes in 1954.
But in horse racing, the two-minute mile-and-a-quarter is still the holy grail, almost 30 years after Secretariat ran 1:59.40 at the Kentucky Derby in 1973. Only one other racehorse, Monarchos in 2001, has broken the barrier at Churchill Downs since then.
Why?