Numerical study of rigid columns. (IMAGE) Tokyo Metropolitan University Caption Columns with low (a) or high (b) proportions of sticky grains in a computer simulation. Different colors correspond to different rigid clusters, colored by how large the cluster is. Note how a single cluster spans the whole box in (b). (c) Stiffness of columns with different proportions of sticky grains (alpha) in simulation. Credit Tokyo Metropolitan University Usage Restrictions Credit must be given to the creator. License CC BY 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.