Felix Frey09.01.2024In 1927, geologist Albert Heim clashed with cartographers at the Federal Office of Topography as he was convinced that their relief maps of Switzerland were depicted in the wrong light. Heim believed that the light source on maps should correspond to natural sunshine.
Felix Frey29.08.2023In 1915, land surveyors realised that the summit of the Rosablanche mountain in the canton of Valais had moved several metres in the space of just a few years. Today, the cause of the movement is more relevant than ever.
