Barrow, Alaska just plunged into a polar darkness that will last the next two months. On Friday, the sun set on the city of around 4,300 for the final time of 2016. The next dawn will be January 22, 2017.
Hundreds of miles north of the Arctic Circle, Barrow is the northernmost city in the U.S.
Barrow is located 2,000 miles North of Seattle, Washington.