Particle accelerators generate a special kind of light that can illuminate tiny details of the microcosm. Here at DESY scientists from around the world use this light to investigate the atomic structure and reactions of promising new materials and biomolecules that might one day serve to make groundbreaking new drugs. DESY’s unique spectrum of light sources makes it one of the world’s leading centres for science with photons. The existing and planned light sources complement one another perfectly. Scientists working at DESY therefore have access to exactly the type of radiation they need for their experiments.