Ever since the world first formed, night has followed day. It is a certainty hardwired into living things. Plants will boost their scent or close up based on the time of day. Animals will hunt or mate, give birth or hatch, at a particular moment relative to dawn or dusk. “This biological clock, the circadian rhythm is ancient, shared and completely fundamental,” ecologist Johan Eklöf writes in The Darkness Manifesto. It is also under threat. “Light pollution”—a term first coined by astronomers searching for ever more remote places to study the night sky—has come to be used by ecologists, physiologists and neurologists who study the effects of disappearing night. Eklöf gives the example of the dramatic decline in insect populations over the past 30 years, one of the biggest impacts of light pollution. Anyone who has seen a moth trapped in a beam of light knows how insects can This story is from Kinfolk Issue Forty-Nine Buy Now Related Stories Arts & Culture Issue 49 Karin Mamma Andersson Inside the moody, mysterious world of Sweden’s preeminent painter. Arts & Culture Issue 49 Jenny Odell The acclaimed author in search of lost time. Arts & Culture Issue 49 Amalie Smith The Danish arts writer finding clarity between the lines. Arts & Culture Issue 49 Ryan Heffington Meet the man bringing choreography, community and queer joy to the desert. Arts & Culture Issue 49 Nell Wulfhart Advice from a decision coach. Arts & Culture Fashion Issue 49 A World of Difference A fun lesson in cultural faux pas.