Richard E Leakey <br/><br/>
The origin of humankind  English 

 - 	New York   BasicBooks,   1994. 
 - 171 
 - 	Science masters series. .
<br/><br/> This book answers the question: What made humans human? Leakey argues that when one of our hominid ancestors acquired the ability to walk upright (called "bipedalism"), the evolution of modern humans became possible, perhaps even inevitable. 
<br/><br/><label>ISBN: </label>0465031358 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Prehistoric peoples<br/>Human evolution
<br/><br/><label>Dewey Class. No.: </label>599.938 R382 O  / 23957