Mysterious giant hole cracks open in Antarctica

A giant hole the size of the American state of Maine or Lake Superior has suddenly, ominously, appeared on the surface of Antarctica and scientists are not quite sure how it came into being. "It looks like you just punched a hole in the ice," said atmospheric physicist Kent Moore, a professor at the University of Toronto's Mississauga campus. The phenomenon, known as a polynia, occurs when open ocean water is surrounded by solid sea ice, leading to changes in the surrounding ice...

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