Our feet are unsung miracles of bones and tissue. Each foot has twenty-six bones and over one hundred muscles, tendons and ligaments. Every day, they support (be honest with yourself) any excess weight. They propel us from place to place over many decades. They run for buses, stand doing the washing up, go on tiptoes to reach things. They are remarkable feats of engineering. If you doubt, ye of little faith, just look at robots. Even with all our technological advances, we struggle to make a robot with articulating feet. Feet are amazing.