Hard Meets Soft (IMAGE) Karlsruher Institut für Technologie (KIT) Caption Hard meets soft: When the sapphire ball moves across the copper sample, the material is modified permanently. Credit Graphics: Paul Schreiber, KIT/IAM 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.