Sample Paints on a Research Canvas (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption This image shows a canvas with paint samples that are studied in detail to learn about chemical changes as the samples age. Credit National Gallery of Art 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.