Path of Least Resistance (IMAGE) Rice University Caption When water was sent through a microfluidic model created at Rice University to mimic underground reservoirs, it took the path of least resistance through wide channels while leaving oil in smaller channels untouched. The lab was comparing water, gas and foam for their usefulness in enhanced oil recovery. Credit Biswal Lab/Rice 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.