Scientists are using 3-D printing tools plus a cell culture to create what is termed a bionic ear. Scientists at Princeton University have created a functional ear that can hear radio frequencies far beyond the range of normal human capability. This project is the research team’s first effort to create a fully functional organ that not only replicates a human ability but extends it by using embedded electronics. It is also the first time that researchers have been able to demonstrate that 3-D printing is an effective strategy for interweaving tissue with electronics.