The fastest humans sprint slowly and for very limited durations compared to most quadrupedal mammals, but even average humans have superlative long distance running capabilities in terms of speed and distance compared to other mammals, especially in the heat. Dan Lieberman (Harvard University) posits that these abilities raise the question of how to evaluate when and how adaptations for running evolved in hominins, and what effect such selection had on the evolution of the human body. (#23669)