308 EVOLUTION AND ANIMAL LIFE 



plements remain to tell the tale of primitive humanity. These 

 give no exact record of chronology. 



So of the actual duration of man's prehistoric existence \ve 

 can make no estimate. Speaking in terms of the earth's 

 history, man is very recent, the latest of all the animals. In 

 terms of the history of man, he is very ancient. The exact 

 records of human history cover only the smallest fraction of 

 the period of man's existence on earth. 



