Find out the answers to questions you never thought to ask! Twelve chapters cover a wide range of topics such as science, history, and entertainment, and each concludes with a quiz to test your knowledge. Get ready to galvanize your gray matter and step into the wonderful world of knowing more than ever before with Who Knew? The Big Book of Questions That Will Make You Think Again . More than 130 fascinating articles across twelve chapters will answer questions such as "Can dogs smell emotion?" and "How did the Incas build Machu Picchu?" This edition includes articles from previous titles in the Who Knew? series, along with dozens of new entries. Packed with information and quirky illustrations, chapters cover subjects such as weather and climate, the human body, art and architecture, animals and plants, ancient history, food and drink, literature, geography, sports, science, film and theater, and the universe and space. A quiz at the end of each chapter will test your knowledge so that you can be sure of being the smartest elephant in the room!.