3 ms·
I always guessed the jaw thing was because men would, essentially, punch each other in the face repeatedly until only one man remained.
by oh_sigh 5y ago
I always guessed the jaw thing was because men would, essentially, punch each other in the face repeatedly until only one man remained.
- LegitShady 5y agoit might be or it might not be. Any trait that would improve sexual selection might proliferate without making an organism more fit. Examples of this include crazy colours on birds, or big tail feathers like peacocks, etc. They aren't survival features - but sexual selection made them proliferate.
- corysama 5y agohttps://www.livescience.com/beards-protect-face-punches.html https://www.livescience.com/beards-protect-face-punches.html