THE MAMMALS 



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sticks and stones at their enemies, and to use sticks for pull- 

 ing in objects otherwise out of reach. Trained chimpanzees 

 have been taught to ride a bicycle, skate on roller skates, 



FIG. 1 80. Young chimpanzee. 



eat at a table with knife, fork and spoon, and to select one 

 of a bunch of keys and unlock a lock. Although savage 

 fighters, chimpanzees are very fond of their mates and 

 offspring, and often manifest intense grief over the loss 



