MIT research scientist Hugh Herr lost both legs below the knee after a 1982 winter climbing ordeal. In less than a year, he hacked his prosthetics to allow him to climb again, and he went on to become one of the world's leading innovators...

MIT research scientist Hugh Herr lost both legs below the knee after a 1982 winter climbing ordeal. In less than a year, he hacked his prosthetics to allow him to climb again, and he went on to become one of the world's leading innovators...