TECHNOLOGY
(3) K-3 Eureka!: The Biography of an Idea series. Illustrated by Aaron Cushley. This concise history starts with German Karl Drais's 1817 invention of a wooden two-wheeled "running machine." It wasn't until 1865 that "someone in France" added pedals to the front wheel. Pedal placement improved over time; original wooden wheels evolved into wood and iron, then solid rubber, and finally rubber tubes in 1888 (developed by Irishman John Dunlop). Houran follows further design refinements and innovations, culminating with "a bicycle for just about everybody" today. The lively illustrations keep pace with the accessible and engaging text. A few more "Bike Facts" are appended.

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