It is also called permanent snow. Eternal snow refers to the snow cover on the peaks that does not melt, even in summer. Posted at a minimum altitude of 2,500 meters, this snow cover accumulates, piles up, compacts, and ends up being welded into a mass of ice. All of the eternal snow then forms a glacier. Unfortunately, for several years, this eternal snow has tended to disappear under the effect of global warming. Let's hope that the ephemeral does not come to replace the eternal.