How do monarch butterflies find their way home?

"Monarch butterflies travel over 2,000 miles from Americas East Coast to central Mexico. Scientists are only beginning to unravel the mystery of the butterfly's super navigational powers. In this...text, readers will discover how life science works in the everyday world. With accessible language to simplify complex concepts, the book challenges developing readers and supports elementary science standards. ...Photographs enhance the text"--Amazon.com.