Percolation in Action (image) University of California - San Diego Share Print E-Mail Caption Brewed coffee, oil extraction, and now communication in bacterial communities can be explained by a phenomenon known as percolation. Credit Suel Lab, UC San Diego Usage Restrictions Image to be used in conjunction with Cell Systems paper on percolation in bacterial communities. Share Print E-Mail 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.