While new optical illusions go viral all the time, here are some of the most famous illusions that have kept us scratching our heads for years.

There is no glue, no cutting—only precision, patience, and a deep understanding of form.

Most people use the terms “optical illusion” and “visual illusion” interchangeably, much like “fluid” and “liquid” or “sofa” and “couch” are synonyms. At first glance, this might be seemingly pedantic ...

Add Yahoo as a preferred source to see more of our stories on Google. Researchers are finding that many of them do experience these perceptual quirks, though not always in the same way. "Illusions ...

Get ready to challenge your perception with these mind-bending optical illusions! Your eyes may see one thing, but your brain ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Hinnerk ...

Everyone loves an optical illusion — even if they leave us completely stumped — and they're all around us in the natural world. From an underwater waterfall in the Indian Ocean to a surrealist scene ...

Our visual system is constantly making assumptions about what we see. In one of my first psychology courses in college, our professor used an effect from Disney's classic Haunted Mansion attraction to ...

Allen Institute researcher Jerome Lecoq points to one of the diagrams that was used in a study focusing on how the brain interprets optical illusions. (Allen Institute Photo / Erik Dinnel) Our brains ...

Optical illusions have a sneaky way of messing with your brain. One second you think you’ve got it, the next - you’re ...