How do the trillions of cells in our body coordinate their actions to support our life and health? This marvel of communication involves constant exchange of diverse signals within and between cells. Researchers in the Cluster of Excellence CIBSS - Centre for Integrative Biological Signalling Studies at the University of Freiburg are dedicated to understanding this biological language that orchestrates multicellular life in humans, animals and plants. The cluster, funded by the DFG, began its work on January 1, 2019.