Flipped iceberg

Photographer Alex Cornell captured this picture of a flipped iceberg in Cierva Cove, Antarctica. Icebergs form when chunks of freshwater ice calve (break off) from glaciers and ice shelves, as well as other icebergs. Gravity keeps the bulk of the ice underwater, leaving just the tip to breach the surface. Melting can trigger calving, but it can also change the equilibrium of an iceberg, causing it to flip. Depending on its size, an iceberg flip can sometimes cause tsunami-like conditions, big enough to endanger smaller vessels.