In 1991 M. Joyner wrote a paper modeling the optimal marathon performance on the basis of physiological factors and predicted a time of 1:57:58 under limit conditions. Yesterday Eliud Kipchoge ran a marathon in 1:59:40, breaking the 2h barrier!https://t.co/GKOHiz30CQ pic.twitter.com/bcF9ArqtTi

— Fermat's Library (@fermatslibrary) October 13, 2019