Brilliantly designed and marvellous in its mechanics, the human body is an Incredible Human Machine. With stunning footage and powerful first-hand accounts, National Geographic takes you on a fantastic journey through an ordinary, yet extraordinary, day in the life of the human body. We reveal its miraculous everyday workings - how we eat, breathe, walk on two feet and even process emotion. Explore striking feats of medical advancement, from unique people who push the human body to its ultimate limits to real-time views of Aerosmith rocker Steven Tyler's vocal chords! Through 10,000 blinks of an eye, 20,000 breaths of air, 100,000 beats of the heart, see how surprising and incredible a day in the life of a human really is.