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Scientists work on the sea ice in the Chukchi Sea, Alaska

Scientists on the sea ice in the Chukchi Sea, off the north coast of Alaska, disperse equipment on July 4, 2010, as they prepare to collect data on and below the ice. The research is part of NASA's ICESCAPE mission aboard the U.S. Coast Guard icebreaker Healy to sample the physical, chemical and biological characteristics of the ocean and sea ice. UPI/Kathryn Hansen/NASA

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