For decades, running the mile in less than four minutes was considered impossible, beyond the physical capacity of the human body. Then one day in 1954 on the Iffley Road track in Oxford, England, something incredible happened: in front of 3,000 spectators, a 25-year-old medical student named Roger Bannister ran a mile in 3 minutes and 59.4 seconds.
More amazing than the achievement itself was what happened afterward. Though forever, runners had tried without success to break the four-minute mile, within a few weeks, the record was broken again. In a few years, the mile had been run in less than four minutes hundreds of times. Today, the record stands at just over 3 minutes and 43 seconds.