November 26, 2017

HOW LONG BEFORE ALIENS CAN SEE THIS ON THEIR LARGE SPACE TELESCOPES? Awash in Artificial Light, the World Gets 2 Percent Brighter Each Year. Honestly, we could probably see this on exoplanets now with what we’ve got. And hey, who could have guessed that making outdoor lighting more efficient would cause people to buy more of it?

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