Ep 2. Incredible Human Machine

Brilliantly designed and marvelous in its mechanics, the human body is an Incredible Human Machine. With stunning footage and powerful firsthand accounts, National Geographic takes you on a fantastic journey through an ordinary-yet extraordinary-day in the life of the human body. Explore striking feats of medical advancement, from glimpses of open-brain surgery to real-time views of Aerosmith rocker Steven Tyler's vocal chords. And meet athletes and other unique people who push the human body to its ultimate limits, reminding us how truly extraordinary we really are.