Includes index.

Discover our planet - its place in space, its volcanoes, wild landscapes, deserts and oceans, hurricanes and earthquakes. Find out how the rock cycle shapes land and the water cycle fills rivers and seas. What's inside Earth, and why is it so hot under the surface? How did our planet come about, and what did it look like in the beginning? How are mountains formed and why are forests important? What happens when glaciers melt and how can we stop climate change? Explore habitats and ecosystems - inside caves, among enormous redwoods, on the savannahs, or deep down under the oceans.