How artificial light threatens nature

Light can be deadly. Many animals and plants are threatened by artificial light. Numerous organisms have found their evolutionary niche in the dark of night, and now have to adapt to bright nights. Not all of them succeed. More than half of all animals are nocturnal. Their sensory organs, their behavior, their orientation and their metabolism are adapted to darkness, moonlight and starlight. But in today's modern world, countless artificial light sources create something called light smog.

Courtesy of DW Documentary on YouTube. Watch on YouTube ↗

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