Guatemalan Tree Cores (image) University of Arizona Share Print E-Mail Caption Professor Kevin Anchukaitis and graduate student Talia Anderson coring trees in Guatemala. Credit Mari Cleven Usage Restrictions This visual may only be used in conjunction with reporting on or posting of this news release. Credit must be given as indicated. Share Print E-Mail 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.