By A Mystery Man Writer
The record for the fastest mile ever ran continues to change. See how far the world record has come since Roger Bannister broke four-minutes in 1954.
Marathon world record progression - Wikipedia
Hicham El Guerrouj sets a world record in the mile
Usain Bolt record collection: the sprint king's greatest hits
What is a Good 5K Time? Averages + Fastest 5K Times
Marathon - Wikipedia
How Fast Can a Human Run? - The New York Times
How Fast Can a Cheetah Run?
THE WORLD RECORD HISTORY OF THE MILE!
These Are the World's Fastest Half Marathoners - Emily Sisson Sets American Record
Marathon
Usain Bolt Has Never Run a Mile
What is the fastest time we will ever be able to run a mile in? - Quora