subsurface-vizulations (IMAGE) Texas A&M University Caption Software depictions of, on left, porous subsurface rock formations containing discrete fractures and, on right, fluid particle flows through the rock fractures. Credit Hongquan Chen/Texas A&M Engineering Usage Restrictions none 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.