Close-up view of Elusa trash mound. (IMAGE) Proceedings of the National Academy of Sciences Caption Close-up view of Elusa trash mound. Credit Image courtesy of Guy Bar-Oz. 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.