From Hazel Beneke, Bribie Island, Queensland, Australia
I have often wondered whether the shape of the human jaw is influenced by speech as well as diet. For example, people who use the precise consonants required by certain languages seem to have distinct lips. The use of the jaw to pronounce the “r” of American speech seems to give the jaw more projection. I wonder how much of this is my imagination, or whether it has been researched.
