A 1550 square km (963 sq mi.) iceberg, designated A81 broke off Antarctica’s Brunt Ice Shelf. A time-lapse of the 'calving ...

Icebergs are large chunks of ice that break off, or calve, from glaciers or ice shelves. This particular one, with a scientific name of A23a, calved from the Filchner Ice Shelf in 1986.

Iceberg A23a measures 40 by 32 nautical miles, according to the U.S. National Ice Center. For comparison, Hawaii's island of Oahu is 44 miles long and 30 miles across .

The world's largest iceberg, A23a, is moving into the open waters near Antarctica after being essentially stuck in place for decades. It's seen here in satellite imagery from Nov. 15.

"Large icebergs bump into the shoals around South Georgia more or less every year - it's a kind of highway for the major ...

"It's a trillion tons of ice," as one expert told NPR. Now the largest iceberg in the world, A23a, is on the move after decades of being grounded on the seafloor.

Iceberg A23a measures 40 by 32 nautical miles, according to the U.S. National Ice Center. For comparison, Hawaii's island of Oahu is 44 miles long and 30 miles across .

While B-22A is a large iceberg, it isn't anywhere near the largest one ever recorded. That record is held by an iceberg called B-15, which measured a massive 4,247 square miles, ...

“The iceberg [A23a] is following a very similar path [to previous large icebergs] and we’ll be interested to see if it also gets caught in the same place as the previous bergs, which span in ...

The world's biggest iceberg — a wall of ice the size of Rhode Island — is lumbering toward a remote island off Antarctica that's home to millions of penguins and seals.

"It's a trillion tons of ice," as one expert told NPR. Now the largest iceberg in the world, A23a, is on the move after decades of being grounded on the seafloor.

Iceberg A23a measures 40 by 32 nautical miles, according to the U.S. National Ice Center. For comparison, Hawaii's island of Oahu is 44 miles long and 30 miles across .