Researchers have just discovered a method of 3D printing super tough and flexible hydrogels. This new method could lead to more sophisticated soft robotics, better drug delivery within the human body, and most incredibly 3D printed human cartilage. This cartilage would be much stronger and more resilient than normal human cartilage. It has the ability to be compressed 99 percent and then bound back to its original form. Read and see more on this incredible discovery at http://3dprint.com/70013/3d-printed-noses-ears-joints/