National Geographic Travelのインスタグラム(natgeotravel) - 4月23日 05時56分

I am always captivated by the blue coloring or glaciers. Compression over time makes the ice more dense, forcing out the tiny air pockets between crystals. When the ice becomes dense, it absorbs a small amount of red light, leaving a bluish tint in the reflected light. Earth Day is a time to reflect on the value of creating a healthy, sustainable environment on our planet. Taken near Seward, Alaska. Photo by @awc007 #earthday

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