In northern latitudes, the effect is known as the aurora borealis. The aurora borealis is also called the northern polar lights, as it is only visible in the sky from the Northern Hemisphere, the chance of visibility increasing with ……
90 percent of the floating ice, however, is below the water surface. Ice shelves are thick plates of ice, formed continuously by glaciers, that float atop an ocean. The presence of the shelves acts as “brakes” for the glaciers. …

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