The stars of Auriga shine over the magnificent moonlit Grand Canyon in the chill night air at a temperature of -18C. The Grand Canyon, a World Heritage Site in northern Arizona, USA, is the longest canyon on the Earth, a steep-sided gorge carved by the Colorado River steadily in about 17 million year time span. The canyon is 446 km long, ranges in width from about 6 to 29 km and attains a depth of more than 1.6 km (a mile).



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