ABOARD XUELONG, Feb. 28, 2016 -- Researchers on the Chinese icebreaker Xuelong, or Snow Dragon, take photos as the research vessel arrives at the sea area of the Prydz Bay after rounding off its second tour around Antarctica, Feb. 27, 2016. The 75-day trip of over 18,000 nautical miles was also the research vessel's first counterclockwise voyage around the ice-covered continent. (Xinhua/Zhu Jichai)
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