Vertical pupils weren’t just made for night vision. It turns out they may also help snakes stalk prey without being seen. Richard Shine and Francois Brischoux at the University of Sydney, Australia, ...

A domestic cat’s eye narrows to a razor-thin vertical slit in bright sunlight, while a grazing sheep stares out through a wide horizontal bar. These are not cosmetic quirks. A 2015 study in Science ...

Have you ever noticed the different shape of the pupil in the eyes of different animals? Some animals, such as the dog, have circular pupils similar to the human eye. Some animals, including goats, ...

Does your pet have vertical pupils or circular ones? This determines the difference between predator and prey, a study finds. Species with pupils that are vertical slits are more likely to be ambush ...

A land animals' ecological niche is a strong predictor of pupil shape, a new analysis has found. Species with pupils that are vertical slits are more likely to be ambush predators that are active both ...

NEW YORK: Scientists have unravelled the mystery behind why cats' eyes have creepy vertical slits for pupils, suggesting the reason may lie in felines' preferred mode of hunting. Vertical-slit pupils ...

Berkeley -- While the eyes may be a window into one's soul, new research led by scientists at the University of California, Berkeley, suggests that the pupils could also reveal whether one is a hunter ...