Rac 2 Painting by Hadley Hanson (IMAGE) University of California - Santa Barbara Caption A Petri dish transforms into a canvas in Ph.D. student Hadley Hanson’s painting of macrophages engulfing cancer cells. Credit Hadley Hanson Usage Restrictions Credit must be given to the creator. License CC BY 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.