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Winter ice in the Bearing Sea is at the lowest levels in 5,500 years

The winter ice in the Bering Sea, northern Pacific Ocean between Alaska and Russia is at the lowest levels ¬†for 5,500 years. Researchers analyzed vegetation that accumulated on the uninhabited island of St Matthew over the last five millennia. Scientists looked at variations in peat layers of oxygen atoms called isotopes 16 and 18, whose […]