blue) and November 26 (red). Iceberg A23a is so big, the British Antarctic Survey calls it a “megaberg.” You could fit Greater London onto it two times over. A23a is the heavyweight iceberg ...

November 26 (red). Iceberg A23a sounds like it should have a vintage horror movie catchphrase like “It came from West Antarctica!” or “Zombie iceberg on the loose!” The veteran iceberg had ...