Ceibal Pyramid Excavation (IMAGE) Smithsonian Tropical Research Institute Caption Dog bones were found at the lowest levels of two pits, each within a pyramid at the Ceibal, Guatemala site. Credit Ashley Sharpe, Smithsonian Tropical Research Institute Usage Restrictions Please credit STRI 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.