International audienceFollowing the rhetoric of Montesquieu, we propose to demonstrate the radical strangeness of the concept of territory through the fiction of an observation of Earth by a society of inhabitants from planet Mars. The strangeness of the Marsians’ point of view will be based on the lack of dissociation between the concept of time and space, as well as the use of a dual approach giving more emphasis on the analysis of links between individuals or objects (Mars-Ties) than on the examination of the structure of social and spatial position of individual (Mars-Is). The paper offers a humoristic analysis through a series of micro-situations where a problem, that appears trivial in Earth inhabitants’ eyes, is radically modified by...