?Gegenstücke? examines science communication as a cultural, social, and epistemic practice that is shaped by its historical contexts as well as its material and medial conditions. It is focusing mainly on two popular science magazines, Bild der Wissenschaft and Scientific American, established in West Germany in 1964, and in New York in 1845 respectively. Both magazines and their relationship are part of a history of imitation and nationalization and thus an extremely complex example for processes of producing popular knowledge.