Crystal Ice Face (IMAGE) Tufts University Caption The ability to select and study crystal ice faces, like this one, could help answer important questions, such as how vapor interacts with ice crystals to produce rain, which pollutants attach themselves to ice crystals, and why no two snowflakes are alike. Credit Laboratory for Water and Surface Analysis, Tufts University. 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.