Ever wondered how many moons there are in our solar system, or the number of Olympic sports, or who the 46 US presidents were? If so, this is the book for you! Leaf through the pages of this beautiful book and you'll find an intriguing array of objects, animals, lists, and artifacts from nature, science, technology, the arts, and history, which illustrate how we order, understand, and make sense of the world. Discover the 40 orders of birds, the 13 levels of the Beaufort Wind Scale, the 88 constellations, the 36 Morse Code symbols, the 206 bones in the human body, and much more! With its combination of attractive, timeless images and expert, engaging text, The Knowledge Compendium Book is perfect for children (and adults!) who are curious about the world and the lists, systems, and categories that help us understand it.