Fossil, ~600 Million Years Old (IMAGE) Science China Press Caption This is a scanning electron microscope image of an animal embryo-like fossil extracted from ~600-million-year-old phosphorite rocks in the Doushantuo Formation of Weng'an, South China. Credit ©Science China Press 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.