Hope Walls, University of Alberta (IMAGE) University of Alberta Caption Hope Walls, a research administrator with the U of A's Geomechanical Reservoir Experimental Facility, holds a rock model created using a 3-D printer. Similar technology will be used to create 3-D models to help understand how oil and gas move through rock formations and fissures. Credit University of Alberta Usage Restrictions Photo credit 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.