This gigantic iceberg first detached from the Filchner ... anchored by a 350-meter-deep ice keel where it stayed for over three decades. It wasn't until 2020 that it began to melt enough to ...

The iceberg weighs around one trillion tonnes ... Icebergs 'ground' on the ocean floor when their keel (the bit below the water's surface) is deeper than the water's depth.

For a year, it hardly moved, its keel apparently grounded on the seafloor ... the drift has undergone a rapid acceleration. The iceberg, currently at 63 degrees South latitude, is following ...

She says with about 90 per cent of the ice sitting underwater, the iceberg got stuck on the sea floor. "So like a ship with a really deep keel, if it gets into shallow waters, it can run aground ...