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Summary A fully updated new edition of DK’s bestselling reference book, containing all the latest knowledge and current thinking in a fresh new design. When? Where? What? Why? This stimulating and comprehensive encyclopedia answers all the questions children love to ask. Each chapter is jam-packed with maps, charts, timelines, diagrams, beautiful images, and amazing facts. Did you know, for example, that a single drop of blood contains five million blood cells? Or that there are areas of desert on all seven of Earth’s continents? Prepare to build your knowledge on a wide range of topics—including Earth and beyond, plants and animals, history and politics, science, technology, and the human body—arranged thematically with more than 9,000 indexed entries and 2,500 colorful images. Cross-reference icons encourage children to explore and discover linked information, feeding their curiosity and building their general knowledge. For Ages 9 and up.