Another One, Cats, and Run: What's a cool fact about the human body  that a lot of people don't know?  /r/AskReddit 5h  alwaysclimbing5  self.AskReddit  Selftext  348 (96%)  446  vault13rev 720 pts 5h (edit 4h)  If we were an RPG character, our main stat would be  endurance.  We are, by animal standards, hellishly undying and unrelenting  terrors, these Terminator-esque nightmares that just DO. NOT.  STOP  So ancestrally we are persistence hunters. That is, our main  tactic for catching prey without fancy weapons was to just run  them down, especially in our way-back home of the African  desert. You can still see it, all over the human body.  We are nearly hairless. This lack of insulation means better  heat dissipation. We have a ton of sweat glands, next to  other mammals. Again, heat dissipation. Another one is our  two-legged gait - walking for us is technically just a series of  controlled falls. We let gravity do half the work, and as a result  use up fewer resources and generate less heat (quadrupeds,  on the other hand, have to do more work with more legs).  Imean, imagine being a more-or-less gazelle of half a million  years ago. You're eating, doing your thing, when this predator  arrives, so you run off. Now most predators, they'll only  chase for a short distance and then call it a day (watch cats,  for instance). But this one... here he is again. So you run. He  returns. You run again. He returns. You're getting hot -you have  to stop and pant to lose heat, but he just keeps jogging.. You  run. He keeps coming. You're tired -you're fast, but not for very  long, and this stretches your limits.  Eventually you just lay there, exhausted and heat-stunned, and  this ludicrous hairless monkey just jogs on over and kills you.  That's our claws, our sharp teeth, even without our technology  and tool-making. We simply don't stop. siriuszstar:I'm scared