Icebergs are break offs from polar ice, There is a whole area of science study of them because they need to know how they behave in order to monitor travel routes for ships. It is normal for polar ice to break down every year in summer and reform again in colder months, icebergs are particularly large chunks that break off, they generally melt as they travel, but they can reach really far south!!don’t worry only around 1% ever make it to anywhere near the shipping channels!
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