Even today, custom-built prosthetics cost an arm and a leg, but there’s no reason why they should. Right now, we can scan someone’s arm or leg, import that scan into a 3D-modeling program ...

Developed by Japanese robotics company exiii Inc., the HACKberry is a prosthetic arm that can be 3D-printed, and works like a real human arm by detecting when nerve and muscle tissue are stimulated.

STEM is short for science, technology, engineering and math. Divine designed a prosthetic arm that has specific gripping power. He started working on it in his sophomore year and finished up in ...