Super-resolution MINFLUX nanoscopy, developed by Nobel laureate Stefan Hell and his team, is able to discern fluorescent molecules that are only a few nanometers apart. In an initial application of this technique to cell biology, researchers led by Stefan Hell and Stefan Jakobs have now optically dissected the distribution of individual proteins in an about 20-nanometer-sized protein cluster within a cellular organelle in 3D using multiple colors. MINFLUX nanoscopy thus proves to be an extremely powerful tool to find out if and how proteins group inside the cell, at the length scale of the proteins themselves.