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.

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A new museum is opening at the American Dream mega-mall — one that says its optical illusion exhibits will allow visitors to experience the seemingly impossible. Paradox Museum is opening its eighth ...

An optical illusion is a visual phenomenon where our perception of thinking about an image differs from objective reality. This image is seen as a high-contrast black-and-white optical illusion made ...

Only those with excellent observation skills can find the odd one out in this optical illusion challenge. Can you beat the 9-second timer? Optical illusions are the tricksters of the puzzle world; ...

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 ...