How do the nerve cells in our brain communicate with each other? What processes take place when T cells render cancer cells harmless? Details of the mechanisms at the cellular level remain hidden from view. Now, special reporter proteins developed by a research team led by the Technical University of Munich (TUM) may help unveil these mechanisms. Our Computational Neuroethology Lab headed by Kevin Briggman and Stephan Irsen, head of our Microscopy Core Facility, have been part of this team.