As a powerful tool in the production of knowledge, comparing plays a crucial part in the sciences and the humanities. This volume explores the relationship between comparing and narrating in epistemic practices and clarifies the ways in which narratives enable or impede practices of comparing. It takes into account related activities, such as measuring and classifying, modeling, establishing norms and categories, as well as organizing and popularizing knowledge, to analyze the ambivalent relationship between narratives, scientific explanation, and understanding. The contributions bring out the epistemic role of narratives, and elucidate how narratives are connected to comparisons and scientific explanations.

When the German chemist Emil Fischer presented his lock-and-key hypothesis in 1899, his analogy to describe the molecular relationship between enzymes and substrates quickly gained vast influence and provided future generations of scientists with a tool to investigate the relation between chemical structure and biological specificity. Rebecca Mertens explains the appeal of the lock-and-key analogy by its role in model building and in the construction of long-term, cross-generational research programs. She argues that a crucial feature of these research programs, namely ascertaining the continuity of core ideas and concepts, is provided by a certain way of analogy-based modelling.