Michael Keenan on Twitter points to an 2012 Wikipedia edit of his (see current version). There's some studies on association between chewy food and jaw size in animals and one 1987 study about chewing gum in children.
Other things can play a role still! Like whatever movements made it less likely for breastfed children to have underdeveloped jaws.
Michael Keenan on Twitter points to an 2012 Wikipedia edit of his (see current version). There's some studies on association between chewy food and jaw size in animals and one 1987 study about chewing gum in children.
Other things can play a role still! Like whatever movements made it less likely for breastfed children to have underdeveloped jaws.