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 ...

Their eyes are large, helping these nocturnal mammals navigate the dark, and their fur color and markings vary by species. Some flying squirrels have only one mating cycle per year but others ...

This is a rarity in primate research, and illustrates just how much remains to be known about these fascinating animals ... These threatened nocturnal lemurs live in the dry forests of western ...

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 ...