ABSTRACT
P. troglodytes, the common chimpanzee. This of course assumes that our mutually common ancestor, approximately 5 million years ago, looked more like P. troglodytes than H. sapiens.
A second perspective is to assume that ontogeny recapitulates phylogeny or that development from embryo to adult in some manner reflects our phylogenetic development. This approach has been taught and held to be true by scientific students of evolution.
