3-D Printed Material Samples (image) Korea Institute of Science and Technology Caption (a) Emile Bell (The Divine Bell of King Seongduk, National Treasure No. 29; (b) Seokguram Grotto (UNESCO World Heritage, National Treasure No. 24); (c) Mud-guard (National Treasure No. 207); (d) Dolmen. These historical relics were printed based on images in the grade 5 social studies textbook. Credit ©KIST Usage Restrictions None 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.