When light pollution causes the night to disappear, a fundamental clock for life on earth is thrown out of balance. Animals and plants are threatened by artificial light. Many organisms have found their evolutionary niche in the dark of night and must now adapt to brighter nights. Some succeed, but for many the brightness becomes a death trap - and causes species to diminish. What solutions is science finding to this problem?
Original title: Licht aus - Wie Kunstlicht die Natur verändert