Climate change blamed for breakdown of currents that circulate heat, nutrients through the Atlantic.
Arctic sea ice has reached its annual winter peak, which was a record low for the satellite era.
The man, one of a group of six campers, suffered injuries to his face and arm and has been hospitalized.
This week, the moon will completely cover the disk of the sun, creating a solar eclipse that only a small part of the world can see.
Learn a bit about these seafaring Arctic giants.
The Atlantic Cod could displace valuable Alaskan fish as the natural barrier of the Arctic Ocean warms with climate change.
Setting aside 12.28 million acres of public land in the Arctic National Wildlife Refuge would seal off from roads and development, including drilling.
As one researcher explains, sea ice is like a moving sidewalk and polar bears travel with it.
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