Following the fabulous, best-selling I Wonder Why series, this fact-filled encyclopedia will enthrall and grip the imagination of every reader. With quirky cartoons and lavish artwork, I Wonder Why Big Book of Knowledgeis designed to amuse and intrigue young readers. From the mysteries of Egypt's great pharaohs and the fascinating myths of ancient Greece to the wonders of the natural world, from stars and planets to erupting volcanoes, scorching deserts, and the animals that inhabit our planet, I Wonder Why Big Book of Knowledgeis the ultimate sourcebook for clear and concise answers to the mind-testing questions children love to ask.