Saturday, January 10, 2015

How Greenland Got Its Glaciers

Greenland is famous for its massive glaciers, but the region was relatively free of ice until about 2.7 million years ago, according to a new study. Before then, the Northern Hemisphere had been mostly ice-free for more than 500 million years, the researchers said.
The Greenland ice sheet began building after plate tectonics and the Earth's shifting tilt reshaped the region, the researchers found. The team narrowed the cause down to three factors: plate
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