Microbial Geosensors (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption An ENIGMA research project showed that environmental site contamination with (a) uranium and (b) nitrate can be effectively identified using bacterial DNA. Credit Courtesy of ENIGMA 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.