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A vivid rainbow accompanied by mammatus (mamma), spotted from the National Center for Atmospheric Research’s (NCAR) Mesa Laboratory, near Boulder, Colorado, US
A primary and secondary rainbow that includes Alexander's Dark Band, an area that appears dark because the raindrops in that region are refracting sunlight at angles that do not direct any light toward the observer, as seen here over Sittingbourne, Kent, England
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A unique perspective of a rainbow during the evening, wherein the view through the front window gave way to raindrops that looked like 'globules of mercury', spotted near Ormskirk, Lancashire, England
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A primary bow and the beginning of a subtle secondary bow, spotted over Sanxia, New Taipei City, Taiwan
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A primary rainbow with a faint secondary bow, spotted over Newcastle upon Tyne, England
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Rainbow near Pennal, Gwynedd, Wales
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A primary bow and a subtle secondary bow over Denver, Colorado, US
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Primary and secondary bows spotted over Haarle, The Netherlands
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A rainbow spotted over the water, near Yanliao Village, Shoufeng Township, Hualien, Taiwan
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The beginning, or the end, of a rainbow, visible amidst a swirl of clouds over North Dundas Township, Ontario, Canada
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An expansive rainbow spotted over the Waihora Clay Target Club in Motukarara, near Christchurch, New Zealand
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A rainbow amidst the storm, spotted over Redland Bay, Queensland, Australia
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A partial rainbow near Brasstown Bald, Georgia, US
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An evening rainbow and a faint secondary bow, following a storm near Melrose, Minnesota, US
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A primary and secondary bow spotted near Sumirago, Varese, Italy
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A primary and secondary bow spotted by Rafael's friend, Cindy Tang, over Changchun, China
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