Resin Samples (IMAGE) University of Bonn Caption Resin samples with embedded ambrosia beetles. Credit Xavier Delclòs / Universitat de Barcelona Usage Restrictions Please use this picture only in connection with the press release. 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.