ナショナルジオグラフィックのインスタグラム(natgeo) - 4月6日 23時06分

Photo by @james_balog. Cameraman Michael Brown probes the abyss of Nova Moulin in the Greenland Ice Sheet. Moulins are vertical shafts within glaciers which water enters form the surface. They can be up to 10 meters wide and hundreds of meters deep, making crampons and rope essential. Follow @james_balog for more images exploring the planet's polar regions. #ExtremeIceSurvey #EIS #Arctic #Greenland #Glaciers #Ice #Nature

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