The world's former largest iceberg, A23a, has dramatically decreased in size due to warming ocean temperatures. Once a colossal mass that dwarfed many landmasses, it has now shrunk to approximately one-fifth of its original size, roughly the area of London. A23a broke away from the Antarctic coast in 1986 but remained grounded for several decades. In 2020, it began to drift, moving closer to South Georgia Island. Since May, scientists have observed an accelerated disintegration of the iceberg.