In this Thursday, June 27, 2013 photo, a bionic ear rests in a petri dish, in Princeton, N.J. Scientists at Princeton University have created an ear with an off-the-shelf 3-D printer that can "hear" ... more 
In this Thursday, June 27, 2013 photo, a bionic ear rests in a petri dish, in Princeton, N.J. Scientists at Princeton University have created an ear with an off-the-shelf 3-D printer that can "hear" radio frequencies far beyond the range of normal human capability. The researchers used 3-D printing of cells and nanoparticles followed by cell culture to combine a small coil antenna with cartilage, creating what they term a bionic ear. (AP Photo/Mel Evans) less 
1 / 23
Associated Press | Photo By Mel Evans
Wed, Jul 3, 2013 2:06 PM EDT