Fig. 3 Sphere Sinking in Apparently Fixed Bed (image) Osaka University Share Print E-Mail Caption Sphere sinking in apparently fixed bed: Local bubbling around the spheres in density ratio ?1.3, whereas no bubble formations in density ratio >1.3. Credit Okayama University, Osaka University, University of Melbourne and Swinburne University of Technology Usage Restrictions None Share Print E-Mail 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.