Humans have small, slender heads and weaker jaws, because of our discovery of soft foods like cheese and dairy, a new study suggests. Research by The University of California suggests the advent of farming, especially dairy products, had a small but significant effect on the shape of human skulls.

http://www.telegraph.co.uk/science/2017/08/25/birth-farming-caused-jaw-dropping-changes-human-skull-scientists/