Gorner Glacier, Switzerland

Photograph by Robbie Shone , Your Shot

Beneath the stars, two scientific explorers descend into the icy depths of a moulin on the Gorner Glacier in Switzerland. The freshly exposed rock above the glacier on the left-hand side shows how the ice has melted under an increasingly warm world. These explorers are mapping the changes taking place beneath the surface. Their work must be carried out at night because high daytime temperatures create vast amounts of meltwater, making exploration difficult and dangerous.

What Makes This a Photo of the Day? This is a beautifully composed frame and so pleasing to look at. I love the sharpness of the climbers and the areas of the ice illuminated by their headlamps, contrasted with the dreamy sky above. Being at eye level with them as they make their descent underscores the feeling of being between two worlds. Alexa Keefe, Photo of the Day editor

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