The peripheral drift illusion causes us to perceive motion in a still image. A new study shows that the mechanism of this illusion relies on changes in pupil size.

Today’s collection of mind-bending optical illusions and confusing-perspective photos is here to give your brain a workout.

Believe it or not, we've seen a few optical illusions in space over the year. Well, we haven't seen them – the Hubble ...

Earth crosses through Saturn’s “ring plane,” making the gas giant’s most iconic feature become nearly invisible ...

Optical illusions have fascinated brain puzzle lovers across the globe, providing an intriguing challenge for the mind. Optical illusions deceive our senses, causing us to doubt what we're looking at ...