Eyes that glow in the pitch-black night make for many a scary tale. But why do some animals' eyes glow at night? "A lot of the animals we see, especially the ones that go out at night, have a special, ...

The smallest bugs and the largest predators seem to have one thing in common: Their eyes glow in the dark. From spider sight to shark vision, find out why these animals have eyes that glow. Say you’re ...

THE physiological function of the tapetum in the eyes of animals of nocturnal habit is uncertain. However, it may fairly be assumed that by reflecting light incident on the retina back through the ...

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 ...

Of all the eyeballs in Glen Jeffery’s office, only a very small minority are his. “Oh, I’ve got an office full of eyes,” Jeffery, a neuroscientist at University College London, told me. Over Skype, he ...

It may sound unbelievable, but reindeer eyes change from a blazing gold in the summer to a deep, dark blue in the winter. However, this isn’t the kind of color change you might expect, as it usually ...

Cats and many other animals, including most dogs, can reflect light from their eyes. That’s why cats’ eyes will usually shine brightly in photos taken in a dimly lit room or glow when illuminated in ...