These three optical illusions seem to exist in a parallel universe in this viral video. "You didn't beat the gravity you just beat my brain," wrote one baffled TikTok commenter. These mental litmus ...

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.

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...

What Is an Optical Illusion? An optical illusion is a visual phenomenon where the brain misinterprets what the eyes see. Instead of showing reality exactly as it is, optical illusions manipulate ...