Global night light is getting bigger and brighter, blotting out the stars of the Milky Way for one-third of humankind, according to a new study of federal satellite data measuring outdoor lighting. Spurred by a shift to more energy-efficient illumination in many areas, artificial night lighting world-wide has been expanding steadily, with potential consequences for human health, wildlife and foliage, scientists led by the GFZ German Research Center for Geosciences in Potsdam reported Wednesday in the journal Science Advances.

Source: Wall Street Journal November 22, 2017 19:17 UTC