 The tracking of where developmental landmarks occur in humans and other primates is a step towards a better understanding of how neoteny manifests specifically in our species and how it may contribute to our specialized features, such as smaller jaws.In humans, the neotonic shift is concentrated around a group of gray matter genes.This shift in neotonic genes also coincides with cortical reorganization that is related to synaptic elimination and is at a much more rapid pace over others during adolescence.