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An iceberg bigger than Chicago is being monitored by Nasa after breaking into the ocean off Antarctica.
The sheet, known as B31, is one of the biggest on the planet at 255 square miles (660 sq km).
Nasa has been monitoring Antarctica's Pine Island Glacier since a crack was spotted in 2011, amid fears any iceberg could contribute to rising sea levels.
B31, which is about a third of a mile (500m) thick, is not currently on any major shipping routes.
However, with winter approaching in the area, it could become difficult to track.
"The iceberg is now well out of Pine Island Bay and will soon join the more general flow in the Southern Ocean," Grant Bigg, from the University of Sheffield, said in the Nasa statement.