Experiment (image) University of Texas at Austin Share Print E-Mail Caption This is a video of a melt-resistant sphere falling through a magma sample. The researchers calculated the viscosity of the magma sample by measuring how quickly the sphere sunk through the magma. Credit Nick Dygert Usage Restrictions Credit image 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.