Bristlecone Pine (image) University of Arizona Share Print E-Mail Caption She and her colleagues used two different tree-ring chronologies from long-lived trees that were alive at the time of the Thera eruption, including bristlecone pines. Credit © Charlotte Pearson Usage Restrictions This visual may only be used in conjunction of reporting/posting of this news release. Credit must be stated 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.