ABSTRACT
This crossing boundaries section addresses the substantial aspects at stake in reshaping the nexus between science, politics and society triggered by the Covid-19 pandemic. In this regard, three main dimensions are explored: first, the emerging forms of science-related populism and how political narratives challenge and dispute prevailing scientific knowledge;second, the platformization of science communication and the active role of users and communities in consuming and spreading online misinformation;third, the role of lay expertise in contesting the epistemic authority of science during the health emergency. The authors explore the related topics by mobilizing different theoretical frameworks from STS studies, media studies and legal science, also moving from empirical to theoretical level in order to challenge the "surface" of a multilayered phenomenon.