The massive Antarctic iceberg A23a, once twice the size of London, is rapidly breaking apart in the South Atlantic after drifting for nearly 40 years since separating from Antarctica. One of the largest and oldest icebergs ever recorded is now rapidly melting after drifting across the Southern Ocean for nearly four decades. The massive iceberg, known as Iceberg A23a, is currently breaking apart in the warmer waters of the South At... [2339 chars]