Color-Changing Crystal (image) University at Buffalo Caption Created by chemists at the University at Buffalo and Penn State Hazleton, this sponge-like crystal contains many pores that change shape when exposed to ultraviolet (UV) light. In addition, the normally colorless crystal (left) blushes in the presence of UV light, turning red (right). Credit Credit: Ian M. Walton Usage Restrictions This image may only be used in conjunction with news stories covering the research outlined in the associated press release. 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.