Cellular biology is a consequence of molecular interactions and chemical transformations. With the unprecedented pace of technological development, we can now look into life and understand it on the level of individual molecules. In this session, we will present the development and applications of molecular tools and methodology to study and alter biological processes. From groundbreaking nanometer imaging (e.g., ultra-super resolution fluorescent imaging MINFLUX) to sub-nanometer structural approaches (macromolecular crystallography and cryo-EM) to the development of new bioactive molecules and therapeutic and diagnostic approaches.