A23a weighs nearly a trillion metric tons, making it the worlds largest active iceberg.
It calved from Antarctica in 1986, making it the worlds oldest berg.
Because A23a is now grounded, it is more likely to break up.
A drone photo of the gigantic iceberg A23a.© Andrew Miller, Capture North Studios
For now, A23a is quite easy to track.
Second, the iceberg is currently stuck in one place.
According to Meijers, Earths ice shelves have lost about 6,000 billion metric tons of their mass since 2000.
Graphic showing the iceberg’s path and its position relative to the island. © The Mapping and Geographic Information Centre, British Antarctic Survey
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