Terre-Mer (“Land-Sea”) is an ongoing project that focuses on both past and future shifting coastlines, and on the relationship between land and sea. It follows field experiments carried out by Marie Velardi in France, Scotland, India, Thailand, Italy and the Netherlands. Based on encounters and conversations with coastal residents, questioning living conditions with the sea and how human beings live with uncertainty and hazards, Marie wrote a Letter from Land-Sea. The project has also led to other productions, including watercolour cartographic paintings representing coastal areas: where the sea once was and where it could come back to, linking memories of land through old historical maps with simulations of rising seas in the future. This method of representing the land does not correspond to the usual distinction between land and sea with a coastline. In her paintings, the coastline is thicker, representing an in-between area, where the land and the sea interact and connect, where the past could meet with possible futures.