NGS <br/><br/>
Why on Earth? 

 - New York, USA  National Geographic Society 
<br/><br/> Questions and answers present information on science topics, including human physiology, animal behavior, each science, and natural science. 
<br/><br/><label>ISBN: </label>0-87044-701-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult Nonfiction
<br/><br/><label>Dewey Class. No.: </label>AN 500 NGS