01093cam a2200301 4500 77126064 TxAuBib 20060926120000.0 880815s1988||||||||||||||||||||||||eng|u 88025486 9780870447013 $6.95 0870447017 $6.95 9780870447068 lib. bdg. $8.50 0870447068 lib. bdg. $8.50 DLC DLC DLC TxAuBib Why on earth. [Washington, D.C. : National Geographic Society, 1988. 96 p. : col. ill. ; 28 cm. Books for world explorers Includes index. Questions and answers present information on science topics, including human physiology, animal behavior, earth science, and natural science. 20060926. Science Miscellanea Juvenile literature. Science Miscellanea. Questions and answers. National Geographic Society (U.S.) Books for world explorers.