Natural history museums were first to register and document biodiversity, and today, they continue to do so. However, their perspective has changed from research to education, leading to a concomitant development of the exhibition: From being collections of research objects, exhibitions became educational environments, resulting in the genesis of the diorama. We discuss the development of the notion of biodiversity from its earliest museum representations to today, where dioramas remain a popular and effective way of disseminating biodiversity. We discuss modern dioramas and the potentials and challenges of presenting biodiversity. Finally, we discuss dioramas as educational devices.