2:44

Light Pollution 101

Ever since the light bulb's invention 150 years ago, artificial light has illuminated homes, streets, and skies -- but with some unintended consequences. Learn about the major types of light pollution, their impact on human health, and how the worldwide glow from artificial light may continue to grow.
Photography

Incredible images of Wales by Starlight

Celebrate the last of the dark winter nights with one photographer’s tribute to some of Britain’s darkest skies.
0:57

Watch the Milky Way Cross the Sky Over Michigan's Tahquamenon Falls

See how this photographer captured the most amazing images of the Milky Way and surrounding landscape.

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