Jonathan Reisman, MD, traveler, and naturalist, takes readers on a fascinating journey through our bodies. With unique insight, Reisman reveals how to diagnose a heart attack, what the body is actually made of (spoiler: it's mostly mucus, not water), how the composition of urine can "read" the origins of humanity, and many other interesting facts. Thanks to its long history work in health care and a passion for travel, Raisman looks at the human body through an unusual lens: a trip to Alaska shows that fat is not the enemy, but the hero; a stay in the Himalayas reveals the border where the brain ends and the mind begins; and eating a ram's head in Iceland teaches a lesson in empathy. By connecting his wealth of experience from different countries and unique cultures to the inner workings of the human body, the author shows how our organs are inextricably intertwined - a true internal ecosystem that reflects the natural world around us. Reisman offers a new and very exciting perspective and helps us to gain a new understanding of our bodies and how they work - in ways we could never have imagined before. Published in Russian for the first time.