Scientists at the Carnegie Mellon University College of Engineering in the Regenerative Biomaterials and Therapeutics Group have been busy refining their 3D printing software and hardware to suit their purposes in bioprinting with soft materials and tissue. They have been able to make a 3D printer for under $1000 that is capable of fabricating these materials through a double hydrogel technique that allows for reliable 3D printing without killing the fragile tissue. While still in its initial stages, their technique is called FRESH, which stands for freeform reversible embedding of suspended hydrogels. With this technique and open-source technology, they have made huge strides in bioprinting, but soon hope to be integrating actual heart cells into their bioprinted tissue, allowing for the fabrication of actual heart muscle. Check out details at 3DPrint.com: http://3dprint.com/102374/cmu-3d-print-soft-tissue/ ‎