SIOUX FALLS, S.D. (KELO) — When winter weather hits in South Dakota, you may notice more blue on the roads. The South Dakota Department of Transportation is adding blue lights to hundreds of plow ...
We’re staring at our devices more than ever, and besides eating up our time, they’re giving off tons of light. Blue light has gotten an especially bad rap, but that’s not quite fair: It’s just one ...
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