Optical 3-D Printing through Fiber (IMAGE) Optica Caption Researchers used an optical fiber housed inside the needle pictured to deliver light for 3-D printing microstructures. The light selectively hardens volumes inside the droplet of photopolymer on the glass slide. The new system could one day allow 3-D printing inside the body. Credit Damien Loterie and Paul Delrot, École Polytechnique Fédérale de Lausanne Usage Restrictions None 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.