https://www.youtube.com/watch?v=P6gai4SbRIU A 26-year-old man who is paralysed in both legs has walked for the first time in five years – just by thinking about it. He is the first person to have his brain activity recorded and used to control a muscle-stimulating device in his legs. Every year, 250,000 to 500,000 people worldwide suffer spinal [...]