E N C Y C L O P E D I A s m i t h s o n i a n E N C Y C L O P E D I A LONDON, NEW YORK, MELBOURNE, CONTENTS MUNICH, AND DELHI US Senior Editor Rebecca Warren US Editor Kate Johnsen Senior Editors Shaila Brown, Daniel Mills, Ben Morgan Senior Art Editors Vicky Short, Smiljka Surla Editors Lizzie Munsey, Sam Priddy, Alison Sturgeon SPACE Designers Daniela Boraschi, Tannishtha Chakraborty, Richard Horsford, Hedi Hunter, Fiona Macdonald Visualizer Peter Laws Illustrators Peter Bull, Rob Cook, FOREAL™, Mike Garland, Mark Garlick, Gary Hanna, Jason Harding, Arran Lewis, Maltings Partnership, Medi-Mation, Peter Minister, Gerson Mora and Anna Luiza Aragão/Maná e.d.i., Moonrunner Design, Ian Naylor, Alex Pang, Dean Wright and Agatha Gomes DK Picture Library Emma Shepherd, Rob Nunn Jacket Designer Laura Brim Producer, pre-production Francesca Wardell Producer Alice Sykes Managing Editors Julie Ferris, Paula Regan Managing Art Editor Owen Peyton Jones Publisher Sarah Larter Art Director Phil Ormerod Associate Publishing Director Liz Wheeler Publishing Director Jonathan Metcalf Contributors Kim Bryan, Robert Dinwiddie, Jolyon Goddard, Ian Graham, Reg G. Grant, Jacqueline Mitton, Darren Naish, Douglas Palmer, Philip Parker, Penny Preston, Sally Regan, David Rothery, Carole Stott, Paul Sutherland, Chris Woodford, John Woodward First American Edition, 2013 Published in the United States by DK Publishing, 345 Hudson Street New York, New York 10014 13 14 15 16 17 10 9 8 7 6 5 4 3 2 1 001—187527—Oct/13 Copyright © 2013 Dorling Kindersley Limited All rights reserved Without limiting the rights under copyright reserved above, no part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of both the copyright owner and the above publisher of this book. Published in Great Britain by Dorling Kindersley Limited. A catalog record for this book is available from the Library of Congress. ISBN: 978-1-4654-1417-5 THE UNIVERSE 10 DK books are available at special discounts when purchased in bulk for sales The Big Bang 12 promotions, premiums, fund-raising, or educational use. For details, contact: DK Publishing Special Markets, 345 Hudson Street, New York, New York Galaxies 14 10014 or [email protected]. Star birth 16 Printed and bound in Hong Kong by Hung Hing Printing Group. Star death 18 Discover more at www.dk.com The Sun 20 The Solar System 22 Inner planets 24 Outer planets 26 The Moon 28 THE SMITHSONIAN Established in 1846, the Smithsonian—the world’s largest museum and SPACE EXPLORATION 30 research complex—includes 19 museums and galleries and the National Zoological Park. The total number of artifacts, works of art, and specimens Astronomy 32 in the Smithsonian’s collection is estimated at 137 million. The Smithsonian Mission to the Moon 34 is a renowned research center, dedicated to public education, national Exploring the planets 36 service, and scholarship in the arts, sciences, and history. EARTH NATURE PLANET EARTH 40 Inside the Earth 42 Earth’s climate 44 TECTONIC EARTH 46 Plate tectonics 48 Volcanoes 50 Earthquakes 52 EARTH’S RESOURCES 54 Rocks and minerals 56 WEATHER 58 Hurricanes 60 The water cycle 62 SHAPING THE LAND 64 Caves 66 HOW LIFE BEGAN 76 Glaciers 68 Timeline of life 78 The dinosaurs 80 EARTH’S OCEANS 70 Tyrannosaurus rex 82 The ocean floor 72 How fossils form 84 THE LIVING WORLD 86 Plant life 88 Green energy 90 INVERTEBRATES 92 Insects 94 Butterfly life cycle 96 VERTEBRATES 98 Fish 100 Great white shark 102 Amphibians 104 Frog life cycle 106 Reptiles 108 Crocodile 110 Birds 112 How birds fly 114 Mammals 116 African elephant 118 SURVIVAL SECRETS 120 Habitats 122 American desert 124 Amazon rainforest 126 African savanna 128 Coral reef 130 Animal architects 132 Predators and prey 134 HUMAN BODY SCIENCE BODY BASICS 138 Building blocks 140 The skeleton 142 Muscle power 144 The skin 146 FUELING THE BODY 148 From mouth to stomach 150 The intestines 152 In the blood 154 The heart 156 Fighting germs 158 Cleaning the blood 160 Air supply 162 IN CONTROL 164 Nervous system 166 Brainpower 168 How vision works 170 Inside the ear 172 MATTER 190 Taste and smell 174 Atoms and molecules 192 Control chemicals 176 Atom smasher 194 Solids, liquids, and gases 196 LIFE CYCLE 178 The elements 198 A new life 180 Chemical reactions 200 Life in the womb 182 Material world 202 Growing up 184 Genes and DNA 186 FORCES 204 Laws of motion 206 Engines 208 Simple machines 210 Flotation 212 Magnetism 214 Gravity 216 Flight 218 ENERGY 220 Electromagnetic spectrum 222 Signals from space 224 Light 226 Telescopes 228 Sound 230 Heat 232 Electricity 234 Power network 236 Radioactivity 238 ELECTRONICS 240 Digital world 242 Robotics 244 HISTORY THE ANCIENT WORLD 248 Imperial China 294 The first humans 250 Rulers of India 296 The first towns 252 Early empires 254 THE MODERN WORLD 298 Ancient Egypt 256 The slave trade 300 The pharaohs 258 The Enlightenment 302 Ancient Greece 260 The American Revolutionary War 304 Ancient Athens 262 The French Revolution 306 The Roman Empire 264 The Industrial Revolution 308 Roman society 266 The Age of Steam 310 The Civil War 312 THE MEDIEVAL WORLD 268 World War I 314 Viking raiders 270 Trench warfare 316 Fortresses 272 World War II 318 Wars of faith 274 Modern warfare 320 World religions 276 The Cold War 322 The Ottoman Empire 278 The 1960s 324 The Silk Road 280 The 21st century 326 Samurai warriors 282 THE AGE OF DISCOVERY 284 REFERENCE 328 Voyage to the Americas 286 GLOSSARY 346 Ancient Americas 288 INDEX 350 The Renaissance 290 ACKNOWLEDGMENTS 359 Shakespeare’s theater 292