We all only get one body, and that has to see us through our entire lives. The idea of failing health is a very visceral fear for the majority of people in the world. It is inevitable, is it not? But with advances in medicine and technology the future might not involve simply growing old gracefully. We might upgrade in order to level up our natural abilities, extend our lives or consign pain and infirmity to history.

(Photo: Ted Kilroy uses eLegs - artificially intelligent, bionic exoskeletons that give wheelchair users the freedom to stand and take independent steps. Credit: Getty Images)