Optical illusions often go viral, but they've been around long before social media. Here are 10 historical illusions that still leave people puzzled.

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A new optical illusion, shared by TikTok creator Mia Yilin, has gone viral across social media. According to a video posted by Yilin, this viral image claims to identify whether a person is a deep ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Sensory information flowing into our brains ...

Optical illusion personality tests are interesting images that trick the brain and eyes into believing what a person sees ...

Psychologists have long been interested in how people interpret ambiguous, bistable images, such as the examples below. Bistable images. Top left: faces or a vase. Top right: rabbit or duck. Bottom ...

Cognitive illusions are assumed to arise by interaction with assumptions about the world, leading to "unconscious inferences", an idea first suggested in the 19th century by Hermann Helmholtz.

Illusions like these mess with the brain's visual processing system, making viewers see things that aren't there in reality. | Credit: Eva Almqvist via Getty Images Optical illusions play tricks on ...

A new video from [Make Anything] shows off a nice combo that has a real visual impact: ambiguous shapes that look different depending on what angle they are viewed at, combined with an unusual ...

In a new optical illusion, what you see in the picture supposedly reveals something about your gender. But much like other ambiguous images, this illusion plays on the way our brains love to fill in ...