A gigantic iceberg drifting unusually far north has been spotted by Australian researchers off an island south of Tasmania. The chunk of ice, 2,300 feet long and 1,000 feet deep, is floating toward New Zealand and could pose a danger to shipping when it splits into smaller chunks. Experts believe the iceberg is one of a number of icebergs, including one the size of Jamaica, that split from Antarctica in 2000 due to global warming and are slowly heading north.
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