By Christopher Carbone, Fox News October 11, 2019 | 2:15pm Enlarge Image Comparison composition that shows Mer de Glace glacier from 1919, left, and 2019. Walter Mittelholzer, Eta-Bibliothek Zürick & Dr. Kieran Baxter, University of Dundee Depressing new aerial photographs of Mont Blanc reveal the extent of ice loss over time in the Alps. A century ago, the Swiss pilot and photographer Walter Mittelholzer flew over Mont Blanc in a biplane to photograph the alpine landscape.