This book is part of a book series called National Geographic Investigates .

This book has been graded for interest at 9-12 years.

There are 64 pages in this book. This book was published 2006 by National Geographic Society .

Jacqueline Ball is the award-winning author and producer of more than 100 books for children and young adults, including the Dino School series and Step Back Science. She lives in New York City. Richard H. Levey is a business reporter and weekly columnist. His first children's book, Dust Bowl! The 1930s Black Blizzard, was published in 2005. He lives in New York City.