By digitally modeling muscles and tendons for the skeleton of Lucy (Australopithecus afarensis), researchers determined that our hominin ancestors could run well but topped out around 11 mph.
Let’s talk about speed for a second. Most of us humans can’t run faster than 20 km/h without a bike, car, or some help. Even Usain Bolt, the fastest person ever, could only run at 45 km/h for a few ...