World’s biggest iceberg battered by waves as it heads north Subject: Environment Section: Climate Change Context: The iceberg named A23a is nearly more than twice the size of Greater London.  After decades stuck to the Antarctic ocean floor, it is now heading north on what could be its final journey. More About News: A23a first broke off the Antarctic coast in 1986, making it the world’s oldest iceberg as well as its largest. The iceberg, which is up to 400 metres thick in places, is currently drifting between Elephant Island and the South Orkney islands. It contains an estimated […]