While admiring a long-lasting double rainbow, Helgo Guderely couldn’t help but notice how the colours seemed to start repeating at the inner edge of the
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Rainbow
The Science Behind the Triple Rainbow – NBC Bay Area
Could there be a triple rainbow?
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Spectacular 'rainbow clouds' light up northern skies in a rare skywatching treat (photos)
7 Types of Rainbows That Remind You Nature is Awesome - Farmers' Almanac - Plan Your Day. Grow Your Life.
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7 Colors of the Rainbow and Their Meanings
Rainbow Clouds NOAA SciJinks – All About Weather
The Science Behind Moonbows, or Rainbows Seen at Night