From the man in the moon to the Virgin Mary's face on a cinnamon roll, humans have a tendency to see things that aren't there.
Mona Lisa's smile appears and disappears as we alternate between peripheral and central vision.
Dung beetles use moonlight's polarization to guide its dung hunts.
Contact lenses bring objects into closer and clearer focus than glasses.
Parents' line of vision is eye-catching to infants.
Is drinking yourself 'blind' just an exaggeration, like 'eating till you burst'? Or can alcohol really turn out the lights?
Mate selection is tricky business. Here's how one amphibian merges two senses to narrow down its options.
Rats have a strikingly different visual system than our own, one that is carefully attuned to their unique needs.
The box jelly has evolved a central nervous system unlike any other animal on Earth.
Vision may not involve creating an inner model of the world in the brain.