Just the Facts, Inventions and Discoveries is a fact-by-fact look at inventions throughout history, from flint tools and the wheel to the Internet and beyond. Inventions and Discoveries features comprehensive details on inventions that changed the world, geological discoveries, and medical breakthroughs, all with full-color photographs and illustrations. Just the Facts provides the most up-to-date information available, presented in a unique easy-reference system of lists, fact boxes, tables, and charts.