Sagan, Carl, 1934- <br/><br/>
Shadows of forgotten ancestors :  a search for who we are / 
Carl Sagan, Ann Druyan. 
 - New York :  Ballantine Books,  1993. 
 - xvi, 505 p. 
<br/><br/> Includes notes and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human evolution