Ryan Pollyea Class (IMAGE) Virginia Tech Caption In this April 2019 photo, Assistant Professor Ryan Pollyea (standing) teaches undergraduate students about permeability in the lab section of Groundwater Hydrology (GEOS 4804). Credit Virginia Tech 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.