The night is slowly fading from our surroundings. Streetlights, signs, shop windows, parking lots, offices, and garden lights create an artificial day, even in the most remote areas. This light can feel comforting, helping people move around and keeping cities active. However, when it becomes too much, lasts too long, or is poorly placed, it can deeply disrupt the lives of creatures that depend on the dark. The night is not an empty space. It is a habitat in its own right, home to many species that rely on darkness for survival. For example, bats hunt at night, and some birds use the stars to guide them during long migrations. Nocturnal insects are also drawn to artificial lights, often circling them for hours. This behavior exhausts them, makes them vulnerable to predators, and interrupts their natural activities, which can affect pollination and the food chain. Artificial light can also create invisible barriers. Some animals avoid areas that are too bright, which can shrink or fragment their living space. Humans also need the night. The natural cycle of day and night regulates our bodies. Too much light in the evening can disrupt our internal clock and delay sleep. Light pollution also hides the night sky from view. In many cities, only the brightest stars are visible, and the Milky Way, once a familiar sight, is no longer part of everyday life for most people. Reducing light pollution doesn't mean making cities dark. It means using light only when needed and placing it correctly. Some ways to do this include directing lights toward the ground, lowering their brightness, turning off unnecessary lights at night, using motion sensors, choosing lights with warm colors, avoiding lighting trees, hedges, and waterways, and limiting permanent decorative lighting. At home, people can also turn off lights on facades, terraces, or gardens when they're not needed. Rediscovering darkness is about recognizing the importance of the night for both nature and humans. Preserving darkness helps protect nocturnal species, saves energy, and brings back the beauty of the night sky. The ecological transition is not just about what we use or create. It can also start with what we choose to turn off.