Having a memory of past events enables us to take smarter decisions about the future. Researchers from the Max Planck Institute for Dynamics and Self-Organization (MPIDS) and Technical University of Munich (TUM) identify the basis for forming memories in the slime mold Physarum polycephalum—despite its lack of a nervous system.
source https://phys.org/news/2021-02-single-celled-slime-mold-nervous-food.html