Dr. Silvana Costa, Kessler Foundation (IMAGE) Kessler Foundation Caption This is Dr. Silvana Costa, former Hearst Foundations' fellow. Credit Kessler Foundation 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.