Guest speaker: Jérôme Chappellaz, glaciologist, climatologist and professor at lʹEPFL

At Estavayer-le-Lac, a huge boulder, brought by a glacier, intrigues. Jérôme Chappellaz, glaciologist and climatologist, tells the story of these erratic boulders and their importance for understanding glaciers, a discovery made by the Swiss Louis Agassiz in the 19th century.