Extremophiles (IMAGE) Penn State Caption Thermus scotoductus cells are visible at 1,000x magnification using a technique called phase-contrast microscopy. Scientists found the heat-loving microbes living in water heaters in homes across the United States. Credit Zhidan Zhang / Penn State Usage Restrictions Non commerciql use only 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.