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Galaxy clusters are the largest structures held by gravitational force, and their formation involves an amount of energy that is only comparable to the Big Bang. For this reason, merging galaxy clusters are often called the largest known particle colliders. These make them important laboratories for the investigation of their three main components: galaxies, hot gas and dark matter. In this presentation, I will show how the study of interacting galaxy clusters can offer some insights into the nature of dark matter and discuss the efforts we have made to provide a reliable description of post-merger systems.