Flex your muscles, blink your eyes, jump up and down! Isn't your body simply amazing? It's the best designed, most beautiful machine you will ever own. It allows you to do incredible things – like look, feel, run and shout. In our fourth issue, Yuti investigates the wonders of the human body. What happens to the air you breathe and the food you eat? What makes a great sportsman? Are kids who have different bodies really all that different from you? Find the answers to all these questions and more inside our latest issue.