In this online exhibition, historian Christian Kehrt describes how polar researcher Alfred Wegener (1880–1930) focused on gaining detailed knowledge about the origins of Greenland’s weather and climate conditions and the dynamics of its ice sheet. His expedition diaries, which are at the core of this online exhibition, are a crucial document for anyone interested in the history polar expedition. His dense and well-preserved diaries allow for a detailed look into everyday life, continuities, and changes in polar exploration in the first half of the twentieth century.