3-D Printed Hydrogels (IMAGE) Massachusetts Institute of Technology Caption MIT engineers have devised a 3-D printing technique that uses a new kind of ink made from genetically programmed living cells. Credit Courtesy of the researchers Usage Restrictions Images are are made available to non-commercial entities, press and the general public under a Creative Commons Attribution Non-Commercial No Derivatives license. You may not alter the images provided, other than to crop them to size. A credit line must be used when reproducing images. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.