THE EVOLUTION OF ANIMAL LIFE 



Cro-Magnon 



Neanderthal 



Pithecanthropus 



Australopithecus 



Fig. 20.8. Comparative aspects of the skulls and restored facial features of the man ape of 

 Africa and early men of Europe and Asia. Note particularly the progressive changes in the 

 proportions of the cranium and the lower jaw. (Adapted from E. H. Colbert, Evolution of the 

 Vertebrates, copyright 1955 by John Wiley and Sons, Inc., printed by permission; Australopithecus 

 skull after W. K. Gregory.) 



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