Rock Cores Help in Search for Answers (IMAGE) Clemson University Caption David Freedman, left, and his graduate students hold the "microcosms" that could be key in helping determine how quickly solvents in rock degrade. Credit Clemson University 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.