Cody Routson, University of Arizona (image) University of Arizona Share Print E-Mail Caption Doctoral candidate Cody Routson of the environmental studies laboratory at the University of Arizona's department of geosciences scrambles up a mountain slope to sample a bristlecone pine tree. Credit Mark Losleben/Laboratory of Tree-Ring Research Usage Restrictions This visual may only be used in conjunction with reporting/posting of this news release. Image/video credit must be included. 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.