Samuel Barnett of MSU (IMAGE) Michigan State University Caption Michigan State University postdoctoral scholar Samuel Barnett researches soil microbial communities in Centralia, Pennsylvania. Credit Keara Grady Usage Restrictions No restriction 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.