The Ancient Technology of the Synovial Joint:

One of the most obvious displays of true technology are joints. In human engineering, a joint is a mechanical connection that allows controlled movement between parts, such as hinges in doors, ball-and-sockets in machinery, and pivots in tool. Every builder knows joints are essential: without them, machines cannot bend, rotate, or absorb stress. They are so common that we rarely notice them, yet they are at the heart of every mechanical system, from engines and robots to furniture and vehicles.

The striking fact is that the human body already contains all of these designs. Hinges, pivots, saddles, and ball-and-sockets are not inventions of modern engineering; they are ancient technologies built into us. And unlike their man-made counterparts, natural joints are far more advanced — lubricated, shock-absorbing, self-repairing, and designed to last for decades under constant use.