"In the tradition of Why We Sleep and The Sixth Extinction, an urgent and insightful look at the hidden impact of light pollution, and a passionate appeal to cherish natural darkness for the sake of the environment, our own wellbeing, and all life on earth. How much light is too much light? Satellite pictures show our planet as a brightly glowing orb, and in our era of constant illumination, light pollution has become a major issue. The world's flora...

Animals embark on a quest to find true darkness when too many artificial lights at night confuse migrating birds, silence singing frogs, and affect the survival of nocturnal animals.