Communication - Lindsy O'Brien - Bog

Travel through time and discover how communication has changed over hundreds of years. From ancient cave paintings to high-tech computers, people throughout history have invented ways to communicate with each other. Learn about some of the key discoveries of the past and where communication technology is headed in the future. Filled with full-color illustrations, fact-packed text, and hands-on experiments, this resource is perfect for science fans, history lovers, and every kid in between.