Ice Rendering (IMAGE) University of Nebraska-Lincoln Caption Renderings of ice crystals growing upward from a water-repellent surface (top) and along a water-absorbent surface (bottom). Credit Proceedings of the National Academy of Sciences USA 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.