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Arctic Ocean was once a tub of fresh water

Arctic Ocean was once a tub of fresh water covered with a half-mile of ice

At at least two points in history, the Arctic was cut off from other oceans.
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Climate change could render many of Earth’s ecosystems unrecognizable
www.washingtonpost.com

Climate change could render many of Earth’s ecosystems unrecognizable

“What we’re talking about here are the kinds of changes that disrupt everybody’s lives" paleoecologist Scott Wing said.
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