December 4, 2013
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A rare total cloud inversion at Mather Point on the South Rim of the Grand Canyon National Park in Grand Canyon, Arizona, USA. Cloud inversions are formed through the interaction of warm and cold air masses.
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People walk by a giant Christmas ball displayed in Nice, southeastern France.
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Artist Alex Chinneck poses on the rooftop of his latest art installation Miner on the Moon (Upside Down House) upon its unveiling on Blackfriars Road in Central London.