It's Monday Marvels! Did you know? That eerie looking green-yellowish glow that is emanated from the eyes of dogs at night is known as "eye shine." The reason why dog eyes glow at night in an eerie way is because the unabsorbed light reflects off the tapetum lucidum, a mirror-like membrane lined with a layer of highly reflective cells which helps dogs see better in dim lights. This membrane reflects back any light entering the eye which enables dogs to see better. This also explains why dog eyes glow in pictures when taken with flash.