PPPL Physicist Mario Podesta (IMAGE) DOE/Princeton Plasma Physics Laboratory Caption PPPL physicist Mario Podesta, one of the scientists who contributed to new research involving the sawtooth instability in fusion plasma. Credit Elle Starkman 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.