Why do submarines use red lights at night?

Submarine interiors bathed in red might be a familiar scene in fiction, but that visual is based in truth. Red light is easy ...
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Pinks, greens and reds: What causes the colors of the northern lights?

People across the country got treated to a light show in the sky Monday night.It was all the buzz as northern lights dazzled stargazers, with many able to see the vibrant colors across the sky.So what ...