On 16th August, Usain Bolt broke his own record in 100m men’s race and clocked 9.58 seconds.
Economist.com put out an interesting analysis (picture below). In 1912 Don Lippincott created record in 100m by clocking 10.6 seconds. So it has taken 97 years to shave off 1 second from the record. I admire Usain Bolt but I think Don Lippincott’s achievement was ever greater as he didn’t get help from all the modern technology (shoes & clothing) and training.