Our chin comes from evolution, not mechanical forces Apr 14, 2015 4:47:52 GMT Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Pincho Paxton on Apr 14, 2015 4:47:52 GMT Link...Why we have chins: Our chin comes from evolution, not mechanical forcesPincho says...I haven't figured out the fractal for the face yet, so I can't argue with the link, but there is usually a fractal to biology so I do not agree... yet.