Not for the first time, nor for the last, the line separating the two countries established in 1861 will be subject to changes.

Part of the border will shift because of the glacial melt, in another sign of how much humans are changing the world by burning planet-heating fossil fuels.

Global warming is causing all Alpine glaciers to recede, affecting natural boundaries and changing mountain routes. As climate change causes glaciers to melt, Switzerland and Italy have redrawn a section of their border spanning a part of the Alps.