“Four hundred years ago, in Florence, everyone could see the stars, but only Galileo had a telescope. Now, everybody has a telescope, but nobody can see the stars.” When we think of natural light, we think of sunny days and open windows. What we should be focusing on, though, are the nights so dark that they are bright. We have created so much artificial light that we are gradually destroying what can be seen as a natural resource or environment in its own right. Natural darkness has become so scarce that some say a car is more important than a telescope for “amateur astronomers” – otherwise, you may not be able to find sky dark enough to stargaze. Read more and see nighttime photos and infographics from The Atlantic.