Suren Manvelyan's macroscopic photos of the human eyes amazed us with their resemblance to a Martian landscape. His photos of various animals' eyes reveal the varied alien planets shining in their irises.
Manvelyan's photos not only contrast the varying shapes of eyeballs and pupils, but also let us explore the textures and colors or different species' irises. Each iris really does present its own landscape — stare at them long enough, and you'll almost forget that you're looking at eyes.
Top image is a Siam cat.