In France all six of the major glaciers are in retreat. On Mont Blanc, the highest peak in the Alps, the Argentière Glacier has receded since 1870. Other Mont Blanc glaciers have also been in retreat, including the Mer de Glace, which is the largest glacier in France at in length but retreated between 1994 and 2008. The glacier has retreated since the end of the Little Ice Age. The Bossons Glacier once extended from the summit of Mont Blanc at to an elevation of in 1900. By 2008 Bossons Glacier had retreated to a point that was above sea level.Another research, published in 2019 by ETH Zurich, says that 2/3rd of the ice in the glaciers of the Alps is doomed to melt by the end of the century due to climate change In the most pessimistic scenario, the Alps will be almost completely ice-free by 2100, with only isolated ice patches remaining at high elevation.