A joint Australian-French study has discovered the calving of a large iceberg from the Mertz Glacier in the Australian Antarctic Territory. The iceberg -- 78 kilometres long with a surface area of roughly 2,500 square kilometres, about the size of Luxembourg -- broke off the Mertz Glacier after being rammed by another iceberg, 97 kilometres long.
The Mertz Glacier had a large crack in it for two decades. A second crack developed opposite the first in the early part of the 21st century. The collaboration studied whether these two cracks would eventually meet, and the processes that would lead to the calving of an iceberg.