A glittering dense iceberg looks like glass as it glimmers in low sunlight -Greenland

An Arctic Tern perches on the edge of an iceberg with its wings outstretched against a dark sky

A deep blue iceberg reflected in still ocean water as fog clears -Greenland

Looking through the open porthole of a ship’s cabin -framing the view of a small iceberg floating on the ocean outside

Two scientists inspect a massive arch in the roof of an iceberg, that has been carved into the ice by meltwater when it was part of a glacier. More research into glacial ice is relevant to climate change.

The town of Narsaq is partially obscured by a large iceberg on the Greenlandic coast, a small hole in the iceberg frames part of the town

A band of meltwater that has frozen inside an iceberg before it calved from the glacier, bright blue and standing out from the main structure

A row of airbubbles frozen captured in time inside an iceberg, viewed close up visible from the water -Greenland

Debris of glacial ice broken off of a glacial front float in the water with a bright blue glacier face in the background

A sweeping line of black moraine (rock debris) has been folded into a glacier before this piece of ice calved (broke) off and drifted into the ocean -Greenland

An iceberg against a dark background of rock and dark blue ocean water looks eerie when lit by moonlight -Greenland

A weathered iceberg with deeply etched sides made by the surrounding ocean water

An iceberg being eroded by the winds and the ocean water starts to melt and break down, climate change will mean more calving of ice into the ocean

An iceberg starts to break down as it is hit by the breaking ocean waves and fierce winds of Antarctica

A detailed image shows a curtain of frozen icicles hanging along the side of a deep blue covered iceberg in Antarctica

A ship looks small against a large iceberg which has started to melt in the summer of the Arctic Ocean -off Svalbard