Iceberg III, Cuverville Island, Antarctic PeninsulaThe waterline of a large iceberg at Cuverville Island, where wave action has slowly carved smooth, concave hollows into the ice. It's a process that takes weeks or months, the sea working away at the base while the mass above holds firm. What drew me to this section was the diagonal band of dense blue ice running through the upper portion. That colour comes from compression over centuries, air squeezed out until the ice absorbs red light and reflects