00795cam a2200253 4500 288231652 TxAuBib 20091209120000.0 990203s1992||||||||||||||||||||||||eng|u 92050155 9780394534817 $23.00 0394534816 $23.00 DLC DLC DLC TxAuBib Sagan, Carl, 1934- Shadows of forgotten ancestors : a search for who we are / Carl Sagan, Ann Druyan. 1st ed. New York : Random House, 1992. xvi, 505 p. ; 25 cm. Includes bibliographical references and index. 19990203. Life Origin. Evolution (Biology.) Druyan, Ann, 1949-