University of Iowa researchers contend chin comes from evolution, not mechanical forces
By: Richard C. Lewis | 2015.04.13 | 12:47 pm
Why are modern humans the only species with chins? UI researchers say it’s not due to mechanical forces, such as chewing, but may lie in our evolution: As our faces became smaller, it exposed the bony prominence at the lowest part of our heads. Results in the Journal of Anatomy.