Human chin came from evolution, not chewing
Our chins did not come from mechanical forces such as chewing but instead resulted from an evolutionary adaptation involving face size and shape - possibly linked to changes in hormone levels as we became more social, fascinating research indicates. “Primates or the Neanderthals did not have chins. In some way, it seems trivial but a reason why chins are so interesting is we are the only ones who have them.
Washington: Our chins did not come from mechanical forces such as chewing but instead resulted from an evolutionary adaptation involving face size and shape - possibly linked to changes in hormone levels as we became more social, fascinating research indicates. “Primates or the Neanderthals did not have chins. In some way, it seems trivial but a reason why chins are so interesting is we are the only ones who have them.
It is unique to us,” said Nathan Holton who studies craniofacial features and mechanics at University of Iowa.Human chin is a secondary consequence of our lifestyle change, starting about 80,000 years ago and picking up great steam with modern humans' migration from Africa about 20,000 years later. Modern humans evolved from hunter-gatherer groups that were rather isolated from each other to increasingly cooperative groups that formed social networks across the landscape.
These more connected groups appear to have enhanced the degree to which they expressed themselves in art and other symbolic mediums.Males in particular became more tranquil during this period, less likely to fight over territory and belongings, and more willing to make alliances, evidenced by exchanging goods and ideas, that benefited each and all.
