This book is part of a book series called Lets-Read-And-Find-Out-Science .

There are 32 pages in this book. This book was published 1999 by HarperCollins Publishers Inc .

Carolyn Otto is the author of more than twenty books, including several award-winning children's non-fiction titles. She has also written poetry and fiction for children and adults. She earned her master's degree from New York University. She now lives in Colorado Springs, CO.