Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than ...

Like this fennec fox, nocturnal behavior makes sense for animals living in blistering desert heat—cooler night temperatures stop them from overheating when exerting themselves. Photograph by ...

Academy Award nominees Amy Adams and Jake Gyllenhaal star as a divorced couple discovering dark truths about each other and themselves in Nocturnal Animals.