Just look at the architecture," Dr Hartmann explained. Blueprint your feet, and you'll find a marvel that engineers have been trying to match for centuries. Your foot's centerpiece is the arch, the greastest weight-bearing design ever created. The beauty of any arch is the way it gets stronger under stress. The harder you push down, the tighter its parts mesh. No stonemason worth his trowel would ever stick a support under an arch; push up from underneath, and you weaken the whole structure. Buttressing the foot's arch from all sides is a high-tensile web of twenty-six bones, thirty-three joints, twelve rubbery tendons, and eighteen muscles, all stretching and flexing like an earthquake resistant suspension bridge.
