Switzerland and Italy are redrawing parts of their 359-mile shared border in the Alps due to melting glaciers altering the watershed and ridge lines that historically defined it. Significant changes will occur beneath the Matterhorn, affecting ski resorts like Zermatt. Switzerland has already approved the modifications, while Italy's final approval is pending. Scientists cite climate change as the primary cause, with Swiss glaciers losing 4% of their volume in 2023 alone. The changes highlight the broader impact of global warming on glacial regions, with experts predicting continued rapid ice loss in the area.