Rare 'rainbow cloud' seen in Brazil
Jean Oliveira via Storyful
Monday, December 12, 2016
A rare and mesmerizing rainbow cloud was spotted in the skies above Caxias, Brazil, on Dec. 6.
A video was posted to Facebook of the weather phenomenon known as cloud iridescence.
According to AccuWeather, "cloud iridescence occurs when water droplets or ice crystals scatter light."
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