Greenland's Sweaty Summer

By Amelia Hennighausen - 2012-08-06T15:47:15Z

Photograph by James Balog/Aurora Photos

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River of Ice

The Greenland Ice Sheet covers roughly 80 percent the surface of Greenland. Glaciers along the island's perimeter drain ice flowing off the land, returning water to the sea as icebergs. Meltwater can accelerate the flow of a glacier by lubricating the underside as it scrapes the rock beneath.

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