Brain teasers come in many forms—some test mathematical skills, some focus on age-related puzzles, and others simply leave ...

Can you spot the hidden carrot in this optical illusion? Test your vision and attention to detail—find it in 11 seconds or ...

However, optical illusions challenge ... plain sight. The black silhouettes of the cats blend together, and the rat cleverly ...

There's a new optical illusion on the block, and it's a good one. Take a look at the image above. Take as much time as you want. It looks as though there's one, maybe two dots at the intersections ...