In laboratories where light itself has long been both instrument and obstacle, researchers have found a way to watch living cancer cells and their surrounding fibroblasts interact in three dimensions without destroying what they observe. By combining high-throughput microscopy with engineered optical systems and unsupervised computational methods, a team has revealed that fibroblasts arrange themselves in symmetric, flower-like patterns around tumor clusters — patterns that shift measurably when drugs are introduced. This is not merely a technical refinement; it is a new kind of seeing, one th