We know everything about our body. Anyone who has diligently studied a school course in human anatomy will agree with this statement. And everyone who agrees is wrong. It turns out that we know much less about our body than we think. Don’t believe me? Then tell me: why do our elbows and knees bend in opposite directions? Where does lower back pain come from? What about toothache? Why do women give birth in pain? And why is their gait so different from men's? Where did men get nipples from if they, as you know, have nothing to do with breastfeeding a baby? Why do some people walk in their sleep? This book will answer all your questions in detail, and will also tell you a lot of very interesting things about man, who (according to Harrison) traces his descent not from a monkey, as the well-known Darwin claimed, but from... fish. You will also find out how the human body will be able to evolve in the future and determine how our distant descendants will differ from us today.