Landscapes that we once took for granted, such as rivers, soils, trees, turn out to be different when we follow the scientists from the Critical Zone and their sensors placed in observatories. Critical zone science helps us to understand the critical places on earth where life is threatened, and where the roles of actors, human and non-human, are unclear. This uncertainty is perhaps the real challenge for architecture at the time of the Anthropocene in the coming years. Through the cartographies of the book Terra Forma, the exhibition Critical Zones at the ZKM and the ethnography of science in action, the conference will explore these changes and how to approach them as architects.