TIL that humans are the only animals that have chins
TIL that humans are the only animals that have chins

www.smithsonianmag.com
A Chin-Stroking Mystery: Why Are Humans the Only Animals With Chins?

TIL that humans are the only animals that have chins
A Chin-Stroking Mystery: Why Are Humans the Only Animals With Chins?
I've just assumed, if you're willing to accept that the human fist evolved for punching, that the chin evolved for taking a punch.
Anyone who hasn't followed that link needs to do so now! It's got human cadaver arms manipulated with fishing line and guitar tuning knobs. It's got a link to an article titled "Your Face: Punching Bag or Spandrel?"
You can't possibly find a better way to spend 10 minutes!
Unfortunately the images don't load without JavaScript, so...
Who downvoted you? I couldn't have sold the article better myself!
Wait, how did they make the cadaver arms punch and slap?
I take "a pendulum-like device" to mean they suspended either the arms or the targets and swung them to a collision.
You read the same article I did, so I'm also a little fuzzy on the exact details other than attaching fishing lines to tendons and possibly tightening them with guitar tuners. I'm not sure how they launched an attack.