Book excerpt: Have you ever wondered why Earth alone has proof of life on it? How has Earth Created? What are many different aspect of Earth that make it unique? What are the transitions and changes Earth has gone through? Are the earths and its components stil changing? Discover answers to these fascinating facts and much more in this book. 500 Facts Earth covers all the information known about our unique planet in a quick facts format. With relevant pictures, diagrams and an attractive layout, this book is a must have for curious young readers.