A grayscale ballerina who appears to be moving. A human who can fit in a doll box. A black-and-white prism that appears to change shape when... Optical illusions are a brain feature, not a bug. Here's ...

Optical illusions play tricks on your brain and can make you see things that aren't really there, from static images swirling around the page to images that stay with you even after you look away.

Add Yahoo as a preferred source to see more of our stories on Google. Multiple shades of grey in a gradient-like background with a single gray bar in the middle Scientists armed with a new computer ...

An optical illusion brain teaser IQ test is a test that involves the perception of images that deceive both the eye and the brain. To make use of your crystal-clear gaze is to look attentively, to ...

A new optical illusion challenge has left many scratching their heads on the internet. In this viral image on Reddit, people have been asked to identify all the hidden books. At first glance, it ...

Optical illusions may make you feel like a fool, but you could be able to train your brain to resist them. “It is very likely that people from the general population have the capacity to be trained to ...

How optical illusions work has been long-debated among scientists and philosophers, who wonder whether these illusions stem from neural processing in the eye or involve higher-level cognitive ...

Artists and scientists have been creating optical illusions for centuries. Here are 35 mind-bending examples that prove you can't always trust what your eyes are telling you. When you purchase through ...