Discover 1204 fantastic facts with this incredible book! WHY does rock become liquid deep below the Earth's surface? WHAT is the world's biggest bear? WHO were the hoplites? Plus, you can have fun with the activities, test your knowledge with the quizzes and read extraordinary information in the 'Did You Know?' boxes. - Hundreds of illustrations, photos and cartoons. - 1204 numbered facts. - Quizzes, puzzles and activities. 18 cm x 23 cm 512 page softcover.