The Wheel and How it Changed the World (History and Invention) - Hardcover

History and Invention traces the historical development and diverse applications of three key technological innovations -- the clock, the wheel, and the light bulb -- and explores their impact on the course of human history.Laid out in easily accessible, two-page spreads and enhanced by scores of full-color photos, drawings, and maps, each volume supplies clear and vividly illustrated answers to the questions young people have about the technology they use every day.From the earliest potter's wheel to the nineteenth-century flywheel and beyond, every increasingly sophisticated application of this elementary invention is explored in this engaging volume.