Physarum polycephalum under a microscope (IMAGE) Technical University of Munich (TUM) Caption The slime mold Physarum polycephalum consists of a single biological cell. Microinjection allows to mark the flow in Physarum in color. Credit Bjoern Kscheschinski / MPIDS 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.