To run an antelope to death, Lieberman determined, all you have to do is scare it into a gallop on a hot day. “If you keep just close enough for it to see you, it will keep sprinting away. After about ten or fifteen kilometers’ worth of running, it will go into hyperthermia and collapse.” Translation: if you can run six miles on a summer day, then you, my friend, are a lethal weapon in the animal kingdom. We can dump heat on the run, but animals can’t pant while they gallop.