The earth

"Alice and Oliver know that Earth is just one planet in a very big solar system. In this engaging book, they will explore the mysteries of the earth and what lies beyond it. Starting with the Big Bang, the kids will take a guided tour through our planet's history, atmosphere, life forms and more. Fun activities at the back of the book reinforce the information and let kids test what they've learned. Includes a helpful parent's guide too."--Back cover.