The Neurobiology of Bonding (IMAGE) University of Colorado at Boulder Caption Two voles cuddle together on the right, while high-tech imaging shows the cells activated in their brain during bond formation. Credit Zoe Donaldson/CU Boulder Usage Restrictions Must credit CU Boulder and use only in conjunction with stories about this study. 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.