Evolution of Man
Human evolution has taken far more than five stages, of course, but these figures represent major milestones in development. A. afarensis is modeled after Lucy, an ape-like ancestor from Africa with the earliest evidence of bipedalism. Skipping ahead perhaps a million years to H. habilis, evidence of tool manufacture is present, and features are more human than ape. H. erectus means upright human, and at this stage, tool manufacture and use of fire were quite developed. H. Neanderthalis is similar to modern humans, both in structure as well as in thinking and communication ability. Finally, H. sapiens sapiens represents the last 40,000 years of development, a time in which humans created art and exercised control over their environment.