Glassy Palladium Rods (IMAGE) California Institute of Technology Caption These are glassy palladium rods, with diameters ranging from 3 to 6 mm. Credit Caltech/Marios D. Demetriou Usage Restrictions With credit as given above 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.