Fossil teeth suggest a long childhood is the prelude to the evolution of a large brain Phys.orgGrowing up slowed down for an early Homo individual Nature.comFossil teeth hint at a surprisingly early start to humans’ long childhoods Science News MagazineWhy do humans mature so slowly? An ancient youth offers clues Science3D reconstruction of the fossil skull of the sub-adult early Homo from the Dmanisi site in Georgia.