The British Antarctic Survey (BAS) announced on Tuesday, March 4 that the A23a iceberg is currently grounded on the continental shelf about 90 kilometers (56 miles) from the island of South Georgia in the sub-Antarctic area.

The world’s largest and oldest iceberg, A23a, has come to a halt near South Georgia Island in the South Atlantic Ocean, according to the British Antarctic Survey.

The world's largest iceberg appears to have run aground off the coast of a remote British island home to millions of penguins and seals — potentially threatening local wildlife, but also providing an opportunity for research into such rare "megabergs.