Living Building Blocks (IMAGE) University of Colorado at Boulder Caption These blocks, incorporating bacteria, are hardy and can even multiply, similar to microbes in a Petri dish. Credit CU Boulder College of Engineering & Applied Science 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.