An iceberg more than four times the size of Manhattan has been slowly drifting along Canada's eastern seaboard, according to NASA.

Chunks of the giant iceberg - dubbed Petermann Ice Island - have broken off and rubbed up against some Canadian shores, though NASA said the iceberg was not likely to h it land, but probably run aground on the sea floor just off the coast, posing a real danger to offshore oil rigs and ships at sea.

The 97-square-mile piece of ice broke from Petermann Glacier in Greenland a year ago, according to NASA Earth Observatory.

Petermann Ice Island
NASA said the iceberg was not likely to hit land, but would probably run aground on the sea floor just off the coast. It does pose a danger to offshore oil rigs and shipping traffic, officials said NASA
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