Test your observation skills with this nature-themed optical illusion challenge. Spot all hidden tortoises camouflaged in ...

So, if you think that your IQ is higher than 100% of people, then by using your sharp Hawk-Eye Vision and observation skills ...

The op-art loving side of the internet has developed a new obsession – the reverspective optical illusion. Taking Reddit by ...

Look closely at this picture. At first glance, you can see a big tortoise in the centre of the image. But look closer, and ...

"WWE SmackDown" in Hershey saw Cody Rhodes and general manager Nick Aldis butting heads. A cut in the first round didn't stop ...

The study of visual illusions in animals provides a compelling window into both the evolutionary continuity and diversity of perceptual processes. Research indicates that many species, from domestic ...

New York — At the Museum of Illusions in New York City, around every corner is a wonder for the eyes. There's a vase that's a face, art that moves with you, and a room that seems to go on forever.

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 ...

A couple of years ago an optical illusion came along and almost broke our site. Over three million people read an article about the most dizzying illusion ever to grace our screens – the rotating ...

Lightness perception, the visual system’s ability to maintain a stable representation of surface reflectance despite varying illumination, has long intrigued researchers. Central to this field is the ...