exhaustion hunt

I've read before about how the human body is supposedly evolved for running and that the earliest form of hunting may have been running after the prey until it collapsed of exhaustion. I always found that hard to believe. Why invest so much energy into a big brain when your survival depends on your ability to sweat and your endurance. But this video is simply amazing. I never imagined humans could be so much physically superior to other large mammals. Bonus points for David Attenborough narration.