An enormous iceberg is heading towards South Georgia Island in the southern Atlantic, where scientists say a collision could devastate wildlife by threatening the food chain. Scientists have long been watching this climate-related event unfold, as the iceberg - the size and shape of Jamaica – has meandered and advanced over two years since breaking off from the Antarctic peninsula in July 2017. BRITISH ROYAL AIR FORCE Iceberg A68a is 4,200 sq km in size and is about the same shape and size as Jamaica. The peninsula is one of the fastest-warming places on Earth, registering a record high temperature of 20.75 degrees Celsius on February 9. The warming has scientists concerned about ice melt and collapse leading to higher sea levels worldwide.