A giant sheet of ice measuring 260 sq km (100 sq miles) has broken off a glacier in Greenland, according to researchers at a US university.
The block of ice separated from the Petermann Glacier, on the north-west coast of Greenland.
It is the largest Arctic iceberg to calve since 1962, said Prof Andreas Muenchow of the University of Delaware.
The first six months of 2010 have been the hottest on record globally, scientists have said.
Thousands of icebergs calve off Greenland's glaciers annually, but they are seldom so large.
Enjoy the last days of summer, everyone. There's a chill in the night air again here in Maine. Time to get your wood in...