Passalid Beetle (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Passalid beetles work together in family units to defend their log tunnel homes and care for their young into adulthood. New Berkeley Lab research has now shown that the beetle's distinct gut microbiome also helps its young survive. Credit Javier Ceja-Navarro/Berkeley Lab 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.