SOIL 3 (IMAGE) Rice University Caption A robust two-stage microbial sensor developed at Rice University will help researchers observe gene expression and the bioavailability of nutrients in environments like soil and sediments without disturbing them. Rather than fluoresce, like current biosensors, these release gas to report on their host microbes' presence and activity. Credit Illustration by Ilenne Del Valle/Rice University 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.