Hugh Herr told us that from the knee down, he’s all nuts and bolts: his legs were amputated below the knee after a mountain climbing accident. He was told he’d never climb a mountain aain. The turning point was when he asked “what does a doctor know about mountain climbing?”
Hugh spent his time in the machine shop to build artificial legs and feet that were optimized for mountain climbing… maybe the ultimate mountain climbing boots! He can adjust his height. If he needs to be seven feet tall, no problem!
Simplicity through biological inspiration
He showed the results of his R&D: an artificial knee that permits a normal gait, navigation over rough terrain. They are active and are designed to behave like the biological components they are replacing.