Embryo-like Fossil (IMAGE) University of Bristol Caption This is a digital model of an embryo-like fossil from the Doushantuo biota. The structures in each cell shown in yellow have been interpreted by some palaeontologists as nuclei, though this has been controversial. Credit John Cunningham, University of Bristol. Usage Restrictions None 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.