Mars may have been a "blue planet" with an ocean the size of today's Arctic Ocean, a new study suggests.

Discover why safeguarding Arctic migration routes is vital for whales facing threats from shipping, noise, and climate change ...

The Arctic is changing rapidly, and scientists have uncovered a powerful mix of natural and human-driven processes fueling that change. Cracks in sea ice release heat and pollutants that form clouds ...

Chinese research submarines for the first time traveled thousands of feet beneath the Arctic ice this summer, a technical feat with chilling military and commercial implications for America and its ...

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An Arctic blast is expected to bring dangerously cold weather to the Midwest and Northeast next week, forecasters say. "A pair of potent cold fronts will plunge into the northern tier of the United ...

The world’s polar bear population is projected to decline by two-thirds by 2050. A new study from the University of East Anglia suggests that polar bears are undergoing rapid genetic changes, and ...

The U.S. Coast Guard is updating its fleet, adding up to six Arctic Security Cutter (ASC) icebreaker ships as part of joint security efforts between the United States and Finland. USCG made the ...

USCG Cutter Healy, shown here operating in the Gulf of Alaska, is one of three operational Arctic-capable icebreakers. (Janes/Michael Fabey) The US Coast Guard (USCG) awarded two contracts on 26 ...

HONOLULU — The crew of the Coast Guard Cutter Kimball (WMSL 756) returned to Honolulu, Jan. 1, after a 120-day, ...