Banfield and Williams (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Jill Banfield and Kenneth Williams collect a sample of water from the East River in Colorado to study the ecosystem’s microbial life. Credit Roy Kaltschmidt/Berkeley Lab Usage Restrictions Creative commons License Original 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.