The best-selling I Wonder Why series answers demanding questions in an unrivalled child-friendly and informative style, guaranteed to arouse the reader's curiosity and develop reading skills. I Wonder Why Fish Grew Legs is jam-packed with fascinating facts about prehistory, from "When did life on Earth begin?" to "What were the Ice Ages?" Titles in the I WONDER WHY series to collect Camela Have Humps Other Qurs Animal Castles Hod Mous and Other Quest Lang Ago Caterpillars Eat So Mach and Other Question Alent Life Cycles Chestnuts Wear Shoes and Other Quest About Horses Columbus Gromed The Ocean and Other Questions About Explorers Fish Grew Legs and Other Ques About Prehisty About Bobg Azimals Gereka Built Temples Other Questions About Ancient Greece Kangaroos Have Pouches Other Ques Lemons Tane Sour ind Other Questions About Series My Tammy Rumbles and Other Questions Alent My Besly Mountains Have Snow On Top and Other Questions About M Planes Have Wings and Other Questions About Troport Pine Trees Have Needles and Other Quesons About Forests Reesuns Wore Togus an Other Quessins About Anoent Rame Pyramids Were Built and Other Questions About Ancient Egyp The Sea Is Salty and Other Quest About The The Sabaru Is Gold At Night and Other Quecoms About Desserts Soap Makes Bubbles and Other Quesicats About Science Spiders Stalactites Hang Down and Other Questions About Caves Oceans Stokes Shed Their Skin and Other Questions About Repoles Spin Wehand Other Questions About Creepy Crnelies Stars Twinkle and Other Questions About Space mere's a Hole In The Sky and Other Questions About The Environment The Sun Rises and Other Questions About Time And Semen The Telephone Rings and Other Questions About Com Ceratops Hod Horns and Other Questions About Dr Volcanoes Trees Have Leaves Other Questions About Plants Blow Their Tops and Other Questions About