Massive iceberg breaks free after 37 years, poses threat to wildlife

The world's largest iceberg, named A23a, is finally on the move after being grounded on the seafloor in Antarctica for nearly three decades. The iceberg, which is over twice the size of London, broke away from the Filchner-Ronne ice shelf in 1986 and has now likely shrunk enough to lose its grip on the seafloor. Carried by ocean currents, it is expected to head eastward at a rate of five kilometers per day. Scientists note that while this iceberg's movement is part of the natural growth cycle, climate change is causing significant ice loss in Antarctica.