1 00:00:00,100 --> 00:00:04,180 2 00:00:04,180 --> 00:00:08,260 3 00:00:08,260 --> 00:00:12,350 On Oct. 29, 2018, a massive iceberg broke away from Pine Island Glacier in Antarctica. 4 00:00:12,350 --> 00:00:16,480 Operation IceBridge flew over the new iceberg, B-46, on Nov. 7, 2018. 5 00:00:16,480 --> 00:00:20,660 6 00:00:20,660 --> 00:00:24,850 7 00:00:24,850 --> 00:00:29,030 8 00:00:29,030 --> 00:00:33,210 Pine Island Glacier is one of the fastest-melting glaciers in Antarctica. 9 00:00:33,210 --> 00:00:37,300 Crevasses criss-cross the glacier as ice flows to the sea. 10 00:00:37,300 --> 00:00:41,420 11 00:00:41,420 --> 00:00:45,550 12 00:00:45,550 --> 00:00:46,880