Gorner Glacier, Switzerland

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.