Perspectives on Rate-of-Change
On 7 July 1999 Moroccan Hicham El Guerrouj ran a mile in 3 minutes 43.13 seconds, 1.26 seconds better than Noureddine Moreceli
- El Guerrouj “smashed” “eclipsed” “shattered” record
Roger Bannister broke the “4 minute mile barrier” in 1954 with 3:59.4
As a rate this is an astonishing improvement in 45 years from 15.04 mph to 16.13 mph, or 7%