That's the second biggest crack I've seen this week.
Flyover Of Massive Antarctic Ice Crack That Formed 490-Square Mile Iceberg

Almost ten years after scientists first noticed the cracks growing, the Brunt Ice Shelf in Antarctica has calved, leading to the formation of a 1,270-square kilometer (~490 square mile) iceberg roughly 150 meters thick. Obviously, I plan on towing the iceberg to California where I’ll secure the record for world’s largest cocktail. Scientists are still examining the data to determine what caused the cracking, but I have the sneaking suspicion it involves a certain sabertooth squirrel and an acorn.