Duping a guppy is easier than duping a ring dove — at least when it comes to a classic optical illusion. In the Ebbinghaus illusion, two identical circles placed side by side are each framed by a set ...

Chances are you’ve encountered some version of the “Ebbinghaus illusion,” in which a central circle appears to be smaller when encircled by larger circles and seems larger when surrounded by smaller ...

An optical illusion is a visual phenomenon where the perception of an image differs from reality. It tricks the brain into seeing something that isn’t there or misinterpreting what is seen. Optical ...