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Where did the ice island T-3 come from?

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The ice island T-3 originated from the Ward Hunt Ice Shelf, which is located on Ellesmere Island in Canada near northwestern Greenland.1

It was named T-3 because it was the third in a series of three radar targets detected north of Alaska. This notable ice island served as a platform for a manned scientific station between 1952 and 1974.1