But in some of the darkest places on Earth– like deep caves, underground tunnels, and certain underwater spots– evolution took a different route. Some animals lost their eyes over time.

Puppies born with a unique feature are an automatic yes for me. Whatever makes them different is what makes them perfect. I'm ...

Professor Lars Schmitz joins WIRED to guide us through a giant tree of life mapping the evolution of eyes in the animal ...

The presence of the tapetum can be observed at night when a pair of glowing eyes reflects back a flashlight or some other light source. (Interestingly, different animals have different color ...

We call this kind of eye a compound eye, and because all the little lenses point in different directions, animals that have them are very good at detecting movement – especially of big things ...

"When I saw his photo I didn't believe he was real," Joseph's owner said of the unique-looking cat Benjamin ... couldn't be more endearing with his different-colored eyes — one yellow and ...