A huge block of ice broke away from the Felchner-Röne ice shelf in 1986 and froze almost instantly at the bottom of the Antarctic Weddell Sea.

The source said that this iceberg is called "A23a" and is more than 400 meters thick and has an area of about 4,1572 square kilometers, which means that its size is more than twice the size of the British capital (<> square kilometers).

Nearly 3 decades later, scientists Ella Gilbert and Oliver Marsh believe the iceberg has shrunk enough to lose its grip on the seabed, as part of the ice shelf's natural growth cycle, and is beginning to move.

They added that the A23a has been named "the largest iceberg today" several times since the eighties, and is sometimes surpassed by larger but shorter-lived icebergs, including the A68 in 2017 and the A76 in 2021.

The two scientists suggested that the iceberg, which is carried by ocean currents, will head east, and according to the available figures, "A23a" is moving at a rate of 5 kilometers per day.

"Although this particular iceberg has broken off as part of the natural growth cycle of the ice shelf, climate change is driving changes in Antarctica's ice, and the continent loses huge amounts of ice each year," they said.