Antarctica's Iceberg A23a, Twice the Size of London, Nears Final Disintegration

Iceberg A23a, one of the largest and oldest tracked icebergs, has been drifting since it calved from Antarctica's Filchner-Ronne Ice Shelf in 1986. Initially grounded on the Weddell Sea seabed for over 30 years, it began moving northward in 2020 through the Southern Ocean. Now breaking apart in warmer South Atlantic waters, scientists expect A23a, once twice the size of London and weighing nearly a trillion tonnes, to fully disintegrate within weeks.