Round Structure at Ceibal (IMAGE) University of Arizona Caption This is a round structure uncovered at Ceibal, from about 500 B.C. Credit Takeshi Inomata/University of Arizona Usage Restrictions This visual may only be used in conjunction with reporting/posting of this news release. Image/video credit must be included exactly as indicated. 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.