Susanne Billig reviews the children’s book “Wenn die Nacht nicht dunkel wird” by Valentina Gottardi, which explores the harmful effects of artificial light on nature. The episode explains how light pollution disrupts the behaviors of fireflies, sea turtles, and plants, framing darkness as a vital habitat. It highlights the book’s accessible scientific explanations and illustrations, while offering practical tips for reducing light usage to protect nocturnal ecosystems.