Mapping of Tumor Models' Rigidity. (IMAGE) CNRS Caption Dark red indicates the most rigid areas, towards the interior of the tumor. The edge is less rigid (yellow-green). Credit Thomas Dehoux/ILM/CNRS Usage Restrictions May only be used to report on this research, with appropriate credit and caption. 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.