Thomas Zack, University of Gothenburg (IMAGE) University of Gothenburg Caption "We can identify the rock from which the rutile originates, even if we only have a tiny grain of rutile," says researcher Thomas Zack, University of Gothenburg. Credit Photo: University of Gothenburg 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.