What will the human body look like in the future? Most of us carry computers in our pockets or wear them on our wrists, but some of us are already embedding them in our flesh and brains. This week, Insight meets people who are integrating technology into their bodies. Some are modifying themselves with implantable and attachable devices to overcome disability, others are choosing to enhance themselves to test their bodies limits. We ask: when does a human stop being a human and to what extent should we adapt the human body with technology? What ethical and scientific questions does it raise?