3D-printed 'living ink' could lead to self-repairing buildings

Never mind 3D-printing organs — eventually, the material could have a life of its own. Phys.org reports scientists have developed a "living ink" you could use to print equally alive materials usable for creating 3D structures. The team genetically engineered cells for E. Coli and other microbes to create living nanofibers, bundled those fibers and added other materials to produce an ink you could use in a standard 3D printer.