4: The Arm Race

When Johnny Matheny lost his arm to cancer he decided it was his chance to help others – so he volunteered to be the guinea pig in any project that came along. Little did he know what the government’s Revolutionizing Prosthetics program had in store for him – and now he has become the first man to ever use their latest robotic arm, which he can control... with his mind.  Photo Credit: Johns Hopkins University Applied Physics Laboratory