Scientists in Antarctica attempt to predict the consequences of a rise in world temperatures by using a giant drill to retrieve revealing samples from millions of years ago.
Take a look at some spectacular images from Gordon Buchanan's Polar Bear Family & Me.
The technology used to film this stunning series helped gather some incredible images.
The Operation Iceberg team follow the epic journey of an iceberg out at sea.
Polar pictures from the programme Vanishing Antarctic.
The Frozen Planet can be surprisingly full of life.
Frozen Planet heads to the ends of the earth to capture incredible wildlife.
The Frozen Planet showcases some of the world's harshest environments.
Hurtigruten ferries sail the Norwegian coast, travelling through breathtaking scenery.