Three-dimensional rendering (IMAGE) Geological Society of America Caption Three-dimensional rendering of stromatolite microstructure, enabling the distribution of phases throughout the structure of the stromatolites to be visualized. Credit Keyron Hickman-Lewis and colleagues Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.