Bacteria Rings (IMAGE) Duke University Caption A bacterial colony genetically edited to include a gene circuit forms a purple ring as it grows. Researchers are using machine learning to discover interactions between dozens of variables that affect the ring's properties such as its thickness, how fast it forms and the number of rings that form. Credit Lingchong You, Duke 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.