Engineers have devised a 3-D printing technique that uses a new kind of ink made from genetically programmed living cells. The cells are engineered to light up in response to a variety of stimuli. When mixed with a slurry of hydrogel and nutrients, the cells can be printed, layer by layer, to form three-dimensional, interactive structures and devices.
from Engineering and Construction News – ScienceDaily https://www.sciencedaily.com/releases/2017/12/171205130112.htm
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