AS THE BIOLOGIST SEES IT 



mens of early man's handiwork have 

 enabled anthropologists to distinguish a 

 series of successive human cultural stages 

 distinguished by marked differences in 

 the amount of variety and degree of 

 elaboration of the weapons and tools and 

 ornaments made and used by prehistoric 

 man during Paleolithic, Neolithic and the 

 early metal ages. It is indeed remarkable 

 how far the students of prehistoric man 

 have been able to go in picturing, with a 

 high degree of presumptive correctness, 

 the major features in prehistoric human 

 life. They even know what other animals 

 he knew, both from actual remains of 

 these animals found in company with his 

 own bones and from the crude carvings 

 and drawings on cave walls made of 

 these animals by prehistoric man himself. 

 There are certain long limestone caverns 

 in southern France whose walls are veri- 

 table picture galleries of Cro-Magnon pre- 

 historic art. The students of prehistoric 

 man know also that many things that 

 were a part of human life as we first 

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