This book is part of a book series called Out Of This World .

This book has been graded for interest at 13-17 years.

There are 112 pages in this book. This book was published 2001 by Turtleback Books .

Ray Spangenburg and Diane Kit Moser have been writing about science for more than 20 years. They are the authors of more than 50 books, including Facts On File's The History of Science set. Former journalists and editors, they have written for numerous magazines, including The Scientist, Science Digest, Space World, and Final Frontier.