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 ...

The nocturnal is a navigational instrument that was first invented in the 16th Century. By focusing on the stars it can estimate the time to within 10-15 minutes. The outer edge of the instrument ...

But for the nocturnal hunter, it has paid off. While most birds are active during the day, many insects and around 70 percent of mammals are nocturnal, coming out at night to forage for food and ...