Now Printing in 3D: Ears

Skateboarding India, poems on Mars, 3D-printed ears and more in our look at the web this week

Researchers at Princeton this week bio-engineered ears that can pick up sound in stereo as well as frequencies beyond human capacity. Utilizing hydrogel (a base material in tissue engineering), silver nanoparticles for conductivity and calf cells, which mature to form collagen, the engineers used 3D printing technology to create the ears from scratch.