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One of the largest icebergs on record has broken away from an ice shelf in Antarctica, scientists have said.
Researchers who have been monitoring a huge crack in the Larsen C Ice Shelf, which had left a vast iceberg more than a quarter the size of Wales "hanging by a thread", say the rift has finally completed its path through the ice.
A 5,800 square kilometre (2,200 square mile) iceberg weighing more than a trillion tonnes has now calved, the team from the Swansea University-led Midas project said.
The final breakthrough happened between Monday and Wednesday and was detected in data from Nasa's Aqua MODIS satellite instrument.