00:04Just a few months ago, this would have been a continuous sheet of ice.
00:14But now look how quickly the ice has melted into rivers that carve out ice valleys,
00:20creating blue pools of water on the surface of the ice sheet.
00:28But the Arctic is heating at a much faster rate than the rest of the planet.
00:34And this melting ice sheet is now the main factor swelling the Earth's oceans.
00:40It's become one of the benchmark measurements for the march of global warming.
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