Schistosoma mansoni (image) University of Illinois at Urbana-Champaign Caption Researchers discovered that Schistosoma mansoni harbors a population of non-sexual stem cells (yellow dots dispersed throughout the organism) that replenish its tissues and contribute to its ability to live in its host for decades. Credit Jim Collins Usage Restrictions Image may be used only to accompany stories about the research described in this release. Credit: Jim Collins 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.