A weathered 'jadeberg' sails like an alien ship through the waters of Antarctica.
Photograph by Stephen Nicol
Photograph by Doug Mcveigh, Australian Antarctic Division
Once thought to a product of microscopic marine life, like the algae colouring this ice, the green hue is now thought to be due to geologic processes.
Photograph by Camille Seaman
A green iceberg juts up through the snow near a group of Emperor penguins.
Photograph by Peter Layt, Australian Antarctic Division
Bands of green and white ice give this jade berg an unusual appearance.
Photograph by Stephen Nicol