Huts, research stations, shelters, monuments or maritime landmarks: human constructions in Arctic and Antarctic are a benchmark for a world that the imagination still thinks be immaculate. Architecture marks might be sensed here as pre-ruins, next to vestiges. The human presence look like incongruous in these remote area. Fine and coloured geometries lost in white stretches that we imagine extending to infinite… In contrast with natives peoples constructions, the architecture of conquest is here scientific, industrial. Almost cosmonaut: humans on a planet.