How are tunnels built deep below the sea?How do we travel into space?How fast does an e-mail travel?Discover the answers to these questions and many more...Use the grid co-ordinates to navigate around the world of machines. Throughout there are amazing facts and statistics, as well as website links to help you expand your knowledge. The informative text is written and checked by experts. Every topic is illustrated by detailed images, photographs, and diagrams.
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