CHARLOTTE MAIN / SCIENCE PHOTO LIBRARY CHARLOTTE MAIN / SCIENCE PHOTO LIBRARY
Antarctic iceberg. Icebergs form as ice cleaves from glaciers and ice shelves where they meet the sea. Only a small proportion of an iceberg is visible above the surface of the water. As they melt, icebergs can form a wide variety of shapes. Photographed near South Georgia in the Southern Ocean around Antarctica.
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