Nuts and Bolts: Seven Small Inventions That Change Catherine Hapka with illustrations from acclaimed collage

with illustrations from acclaimed collage artist Clare Youngs

Maple cream goes great on toast

find 100 incredible facts in this book

It will give you courage and hope

Like most parents or parents-to-be

Nuts and Bolts: Seven Small Inventions That Change Catherine Hapka with illustrations from acclaimed collageSome 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,