Spaces expand or disappear. Oceans become deserts. Rock erodes to sand and dust. Humans, with their short lifespans, hardly notice the environmental changes time scrawls across the earth. We are constantly moving from one place to another, fleeing hunger, war or the forces of nature, but also driven by a sense of longing that pulls us forward. AT THE BOTTOM OF THE SEA traces forms of migration, interweaving them with geological and archaeological cartographies.