Gold Nugget-Producing Bacteria (IMAGE) University of Adelaide Caption This is an electron microscope images of a gold grain surface (A) and a bacterial cell on the surface of the gold (B). Credit Adelaide Microscopy Usage Restrictions For use with this story 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.