Nuts and Bolts: Seven Small Inventions That Change Monica Chenault-Kilgore - Prenatal and newborn care

- Prenatal and newborn care

Are you fast enough to spot the animal

extraordinary debut about Zoe and Jack

Filled with clear and concise advice

A gripping and scrupulously reported (The Washington Post) investigation into the battle over identity in China

Nuts and Bolts: Seven Small Inventions That Change Monica Chenault-Kilgore - Prenatal and newborn careSome of humanity's mightiest engineering achievements are small in scale and, without them, the complex machinery on which our modern world runs would not exist. In Nuts and Bolts, structural engineer Roma Agrawal examines seven of these extraordinary elements: the nail, the wheel, the spring, the magnet, the lens, the string, and the pump. Tracing the evolution from Egyptian nails to modern skyscrapers, and Neanderthal string to musical instruments,