A chimpanzee’s toes are long and splayed, and its big toe equivalent pulls away from the other digits like a thumb: a prehensile foot designed for quick climbing. By contrast, in the human foot, the sole is enlarged while the bone of the big toe is thickened and aligned with the other, now-foreshortened toes: This…

We are sorry, but this content is for Free Digital and Premium Digital members only.
Log In Register
Log in or Register to save this content for later.