John Speakman in the field (IMAGE) Proceedings of the National Academy of Sciences Caption John Speakman in the field on the Qinghai-Tibetan plateau (c. 2008) with a plateau pika. Credit Image credit: Qingsheng Chi. 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.