I am very, very old—4.5 billion years old! It takes me 365 days to travel around the sun. You and other animals and plants live on me. Who am I? I am the Earth. In this googly eyes board book, find out about the amazing planet we live on. How old is Earth? How many days does it take to travel round the sun? What makes it so special that we can live on it?Each title in this fun, young, non-fiction series poses questions, provides answers and makes perfect edu-tainment for the very young.