Did you know that traffic lights existed before the car was invented? Or that you blink less often when looking at a computer screen? Or that children's author Roald Dahl invented a life-saving medical device? Explore the weird and wonderful world of machines and technology with 500 fantastic facts presented in a highly visual style. Packed full of jaw-dropping facts and incredible graphics, from lawn mowers to space shuttles, this handy book is the perfect guide to technology for readers aged 8+.