Until recently, the very effects of climate change could be described with tables and scientific papers, but at the same time it was hard to offer a clear picture. How can a century-long global phenomenon be explained? The colossal work by Fabiano Ventura, “On the Trail of the Glaciers,” analyses historical photos of mountain glaciers taken in the Karakoram, the Caucasus, Alaska, the Andes, the Himalayas and the Alps. It compares these with pictures of the same places as they are today using the same vantage point (repeat photography). Comparison and the visual power of images reveal the dramatic transformation of glaciers due to climate change. In Spring 2018, Fabio Ventura completed his Himalaya expedition together with geologist Andrea Bollati and documentary direct...