Under Defense Advanced Research Projects Agency (DARPA) sponsorship, APL is leading a revolution in prosthetic arm capabilities, an effort that is producing prostheses with functional capabilities similar to those of native limbs. The Modular Prosthetic Limb (MPL) offers 22 degrees of motion, including independent movement of each finger, in a package that weighs about nine pounds (the weight of a natural limb). Providing nearly as much dexterity as a natural limb, the MPL is capable of unprecedented mechanical agility and is designed to respond to a user's thoughts.