An old Qilian juniper tree (IMAGE) Proceedings of the National Academy of Sciences Caption An old Qilian juniper (Juniperus przewalskii) tree growing on Delingha region on the northeastern Tibetan Plateau. Credit Image credit: Bao Yang. 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.