National Geographic Travelのインスタグラム(natgeotravel) - 8月2日 00時36分

My all time favorite photo assignment was documenting the Northern Lights last winter. The neon green lights in the sky twisted and danced around for over 4 hours. This #arctic circle sign in Yukon Territory is visited frequently in the summer season but in the winter with -45c temperatures you won't find anyone. The #NorthernLights, also known as the Aurora Borealis, is natural light caused by the collision of energetic charged particles with atoms in the Thermosphere. Photo by Mike Theiss @ExtremeNature

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