Biological sample (IMAGE) Optica Caption The researchers used their CARS microscopy system to image a tissue sample from a mouse spine. The image shows the bone marrow region (green), muscle region (blue) and the bone tissue (red). Credit Dario Polli, Politecnico di Milano Usage Restrictions None License Original 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.