A basic rainbow streaks across the sky in Oregon Raceway Park in Grass Valley, Oregon. Curt Smith via Flickr, CC-BY-2.0 Though not a rainbow, these iridescent clouds are a similar visual treat. sandid ...
Did you know that in the U.S. we generally count seven colors in a rainbow whereas elsewhere in the world people only count five? We all see the same rainbows but it can be tricky to count the colors ...
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