DARPA's Revolutionizing Prosthetics program, led by the Applied Physics Lab, is developing a mechanical arm that is a quantum leap beyond those now used by amputees. Thanks to APL biomedical innovations, prosthetics have entered a bold new era. Through The team set out to craft the most advanced artificial limb ever, one that would allow a user to button a shirt, pick up small objects or hold a loved one's hand. What's more, the prosthetic will be controlled by the wearer's own brain and muscle signals. Advances and research made in prosthetics by APL over the past several decades help move today's program forward.