In dives to the seafloor, scientists have noticed big differences in only a few years.
Ice in the north Bering Sea is diminishing, researchers aboard a Coast Guard ship report.
Scientists first caught on to the strange event when they found thousands of purple sea urchins and other organisms dead in their laboratory tanks.
The report on Wood Buffalo National Park says industry, dams, climate change and natural cycles are sucking the lifeblood from the vast delta of northeastern Alberta's Peace and Athabasca rivers
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