Image 3 (IMAGE) Nanyang Technological University Caption To illustrate their point, the scientists demonstrated how a flat sheet of pollen bilayer material, when exposed to changing humidity levels, was able to bend and fold into desired 3D configurations. The scientists believe this new bilayer material (of pollen-based paper and toner powder) could pave the way for intelligent green products. Credit NTU Singapore Usage Restrictions Use with mandatory credit License Original 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.