3-D Model of a Tumor (IMAGE) University of Edinburgh Caption This is a three-dimensional model of a tumor showing cell types in varying colors. Credit Bartek Waclaw and Martin Nowak 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.