Usborne Book of Inventors, The

Summary: ENTER THE WORLD OF INVENTORS! From the wheel to the telephone to the Walkman, meet the men and women behind these inventions. From the earliest people who made weapons out of sticks and stones, to the masterminds of the computer age, trace the history of technological developments. Discover the origins of the railroads, calculators, and space shuttles. How does a microwave oven work? How is your voice transmitted through telephone wires? How do lasers save lives? Find out the answers as you share in the excitement of discovery and thrill of innovation.