According to the Chimpanzee Genome Project , the human ( `` Ardipithecus '' , `` Australopithecus '' and `` Homo '' ) and chimpanzee ( `` Pan troglodytes '' and `` Pan paniscus '' ) lineages diverged from a common ancestor about five to six million years ago , assuming a constant rate of evolution .
According to the Chimpanzee Genome Project , both human ( `` Ardipithecus '' , `` Australopithecus '' and `` Homo '' ) and chimpanzee ( `` Pan troglodytes '' and `` Pan paniscus '' ) lineages diverged from a common ancestor about 5 to 6 million years ago , if we assume a constant rate of evolution .