The optical illusion seen above makes the viewer feel as if they are falling into an expanding hole – and now we have a good explanation for why this happens. To investigate whether the expanding hole ...

Don’t trust your initial perception.

Optical Illusion: Today's puzzle is going to be one of the hardest you have solved yet! Wondering 'how are we so sure'? Well, that's because this brain teaser is especially for people who want to test ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. An optical illusion that appears to show two dogs and their owner walking in the snow. We're suckers for a good optical illusion ...

The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception. By Katrina Miller See more of our coverage in your search ...

Optical illusions are commonly used to learn about the human psyche. Some turn simple changes into unrecognizable faces, make people look alien-like, cause you to hallucinate, and even determine how ...

This famous optical illusion is said to test the viewer’s relationship and reveal how they communicate with their partner. Le Baise (French for “The Kiss”) is a well-known artwork by Russo-Polish ...

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 ...

Medical imaging experts are adept at solving common optical illusions, according to research from four UK universities, including the University of East Anglia. The correct analysis of medical images ...