The world's largest iceberg, A23a, is rapidly breaking apart in warmer waters after a long period adrift. Originally a colossal "megaberg" weighing close to a trillion tons, it has shrunk to less than half its original size. Despite this fragmentation, it remains a substantial iceberg, measuring 1,770 square kilometers. Scientists anticipate its complete disintegration within weeks. A23a calved from the Antarctic shelf in 1986 and remained grounded on the Weddell Sea floor for over three decades. It broke free in 2020 and was carried by currents into the South Atlantic. Earlier this year, it briefly ran aground near South Georgia island, posing a threat to local wildlife. However, it dislodged and continued its journey. While iceberg calving is a natural phenomenon, the increasing rate of ice loss from Antarctica is likely linked to human-induced climate change.