Do you know what your night sky would look like without light pollution? In this video, we explore what the night sky of five major metropolitan areas would look like without bright city lights. Because of light pollution, over 75% of the world’s population can’t see the Milky Way. This is significant because humanity has relied on the night sky for timekeeping, navigation, and storytelling. Light pollution also affects our sleep and wake cycles by disrupting our circadian rhythm. Some cities are introducing legislation aimed at protecting our view of the night sky by promoting energy-efficient lighting practices!