There were three factual errors in the Inside JEB article, `100 m world record title could go as low as 9.48 sec', published in issue 24 of volume 211 of The Journal of Experimental Biology. The prediction for the women's 100 m world record is 10.39 s and not 10.19 s. This would take 0.1 s off the current world record. The prediction for the women's marathon world record is 2 h 15.25 min, and not 2 h 12 min and 41 s. I apologise for these errors.