Souris City (IMAGE) CNRS Caption Souris City: a common living system, composed of two 1m2 cages on the floor, where the animals have access to an automatic test area in a T-shaped maze. Credit Nicolas Torquet/NPS 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.