Nao and Pepper have perfectly shaped hands and fingers. But the fingers are now facing serious competition. Scientists at University of California- Santa Cruz and Ritsumeikan University in Japan have designed and produced a robotic finger inspired by the human endoskeletal structure. From the abstract of the paper “3D Printing an Assembled Biomimetic Robotic Finger”: “We present a novel approach for fabricating cable-driven robotic systems. Particularly, we show that a biomimetic finger featuring accurate bone geometry, ligament structures, and viscoelastic tendons can be synthesized as a single part using a mutli-material 3D printer. This fabrication method eliminates the need to engineer an interface between the rigid skeletal structure and elastic tendon system. The artificial muscles required to drive the printed tendons of the finger can also be printed in place.” The biomimetic robotic finger was presented at the 17th International Conference on Ubiquitous Robots (UR). The paper is available here.