Sometimes, reality plays tricks on us — and what seems obvious at first glance turns out to be something completely different ...

Optical illusions are one of the biggest trends on social media websites these days. Each day, posts on Reddit and other platforms bring new challenges for users. The latest to grab attention shows a ...

Do animals see illusions like we do? A study tests guppies and doves to find out how different species process visual tricks.

A grayscale ballerina who appears to be moving. A human who can fit in a doll box. A black-and-white prism which appear to change shape when viewed from three different directions. Those are the top ...