DK 
How Everything Works 
From Brain Cells to Black Holes

Have you ever wondered how an email gets to someone on the other side of the world in just a few seconds or why it“s a bad idea to stand under a tree during a thunderstorm?
Each page of this mind-blowingly detailed and ambitious encyclopedia will guide you through the natural world and the technology that surrounds you. Giant, page-filling illustrations take objects apart – or take the roofs and walls off buildings – to show you how they work, explaining both basic principles (such as photosynthesis) as well as broader concepts (like how all the living things in a rainforest interact). Chapters range from the human body to cities and industry, to planet Earth, taking in sleep patterns, cooking, sewage systems, wind farms, fungi spores, and plate tectonics along the way.
How Everything Works is perfect for children studying STEM subjects at school or anyone who is simply curious about how nature and the modern world work.