The latest title in the Cool… series introduces the creative and inventive world of technology with fun facts, timelines, experiments to try at home, and more! Technology is all about inventing new devices and tools—things that we use every single day! From Stone Age tech, such as hand axes and sewing needles, to microcomputers and nanotechnology, get stuck into the intriguing, exciting, and ingenious world of Cool Technology. From biographies of figures such as Bill Gates, A