Drone Image (IMAGE) Washington University in St. Louis Caption A drone captured images of Tugunbulak in 2018. (Credit: M. Frachetti) Credit Michael Frachetti Usage Restrictions None License Original 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.