How Auroras are formed http://pic.twitter.com/8hUVFaxvBX
— World and Science (@WorldAndScience) June 11, 2017
via Twitter https://twitter.com/WorldAndScience
June 11, 2017 at 05:30AM
How Auroras are formed http://pic.twitter.com/8hUVFaxvBX
— World and Science (@WorldAndScience) June 11, 2017
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