This book is part of a book series called Dk Eyewitness .

This book has been graded for interest at 8-12 years.

There are 72 pages in this book. This book was published 2004 by DK Publishing (Dorling Kindersley) .

Jack Challoner has written and lectured on a wide range of science topics. Dr Rodney Walshaw has worked for the British Geological Survey and edited several renowned geoscience publications.