NASA photographed a one-trillion-ton iceberg in Antarctica that looks perfectly rectangular as part of its Operation IceBridge. Tabular icebergs, large slabs of ice with nearly vertical sides and a flat top, unlike the jagged, chunks of ice we typically think of as icebergs, are formed when ice shelves become too large and sections of it calve, or split off. The calving is accelerated when warmer temperatures cause meltwater to trickle into the splitting cracks and widen the ice shelf division.
NASA photographed the strange object in Antarctica last week as part of Operation IceBridge. Sitting amid a chaotic jumble of floating ice, it looks perfectly rectangular, as though it was deliberately cut.