Ok, there’s loads of theories as to why humans have a lowered larynx. I went to a talk about this in York probably about a year ago now and when I started reading about all this again it all came back and I thought I’d share Mark Jones‘ hypothesis with you all.
First, here’s a brief history of lowered larynx theories:
Whilst other primates have the ability to lower their larynx to make vocalisations it is only humans who have it permanently lowered. This means that humans when swallowing have to raise the larynx. This is thought to have not evolved in other species as it creates a significant risk of choking on food if the larynx is not raised on time. So if it’s so maladaptive how come it evolved in Humans?