This is a February 2017 image of the Larsen C ice shelf in Antarctica made available by the Antarctic Survey on Wednesday July 12, 2017. A nearly one trillion tonne iceberg, measuring at least 5,800 square km, broke away from Antarctica, according to scientists on Wednesday, potentially creating a hazard for movement of ships around the continent. As per scientists at the University of Swansea and the British Antarctic Survey, the iceberg, one of the biggest on record, broke off from the Larsen C Ice Shelf in Antarctica between July 10 and 12. The scientists enumerated the iceberg has been very close to drifting off for a few months. (Source: British Antarctic Survey via AP)