gedaliyah@lemmy.world to Today I Learned@lemmy.worldEnglish · 7 个月前TIL humans are the only animal with a chin. We aren't sure why.www.smithsonianmag.comexternal-linkmessage-square154fedilinkarrow-up1494arrow-down114cross-posted to: til@lemmy.catodayilearned@lemmit.online
arrow-up1480arrow-down1external-linkTIL humans are the only animal with a chin. We aren't sure why.www.smithsonianmag.comgedaliyah@lemmy.world to Today I Learned@lemmy.worldEnglish · 7 个月前message-square154fedilinkcross-posted to: til@lemmy.catodayilearned@lemmit.online
minus-squareBigFig@lemmy.worldlinkfedilinkEnglisharrow-up22·edit-27 个月前You see a chin area yes, but it is simply the bottom of the jaw. The human chin has actual muscle that goes below the jaw bone and can be moved ever so slightly which aids in facial expression. https://en.wikipedia.org/wiki/Mentalis?wprov=sfla1
You see a chin area yes, but it is simply the bottom of the jaw. The human chin has actual muscle that goes below the jaw bone and can be moved ever so slightly which aids in facial expression.
https://en.wikipedia.org/wiki/Mentalis?wprov=sfla1