Perception researchers have discovered many illusions where context affects perceived size and distance. A great example of this is the Ponzo illusion (reviewed in an earlier blog post). The Ponzo ...

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...

"The Last Leaf" by O. Henry, published in 1907 in his collection The Trimmed Lamp and Other Stories of the Four Million, ...

A picture appearing to show a cow with no visible body grazing on a patch of grass is proving to be the source of much a-moo-sement online. The optical illusion was shared on Reddit by a user posting ...

An optical illusion, in simple terms, is something that deceives the eye by appearing different from reality. If you set your eyes on something and it appears different from how it really is, you ...