One of the most beautiful things is the sky on cold, clear nights. The sky fills with thousands of twinkling stars, and the longer you look, the more you manage to see. What we see are traces of history, and sooner or later, the stars will burn out. The starry sky we see today will one day be covered by darkness. What we might not see is that humanity is already creating that void– a sky without stars. To avoid the darkness of the night, we light up our surroundings. For most of human history, the cosmos has greeted us on clear nights, but today, it’s vanishing into our own light pollution. Every year, the sky grows 10% brighter where we trade the glitter of the stars for the artificial glow of our electricity.