Scenes from an expedition to the Gorner Glacier system in Switzerland. Rising global temperatures are taking their toll on glaciers worldwide. ESA astronaut Luca Parmitano joined glaciologists and climate experts to learn more about this phenomenon, and reflects on his experience and the importance of preserving our environment. Interviews in this set include representatives from ESA as well as scientists from the University of Zurich and ETH Zurich in English, Italian, German and French.