It looks eerie and even sinister the way some animal’s eyes glow in the dark. When photographed their eyes look like small balls of green or golden fire. Some animals have red or orange tints as well. Many horror stories use this phenomenon to scare us but not many of us know that the shining bright eyes of the animals are a purely biological incident. The animals that have to perform necessary tasks at night, such as hunting, need to see in the dark. This way their chances of survival increases. Dogs and cats have been domesticated but still they are nocturnal hunters and need to see in the dark.
