Why Does the Earth Need the Moon?

Explore the science behind more than 200 questions about our planet. DK''s exciting new Earth encyclopedia answers children''s biggest, and weirdest, geography questions, covering volcanoes, earthquakes, oceans, and more!

Did you know that the Earth''s biggest waterfall is underwater, or that mountains grow? This children''s book, ideal for ages 6-8, will help inquisitive minds find out the answers...