Warning: This optical illusion might give you a headache. At a glance, the swirls of tilted black-and-white squares create the perception of a spiral. Look more closely and you realize that the ...

This spiral illusion seems like a chaotic intersection, but the circles never cross! What you perceive first reveals whether ...

We know logically that optical illusions are not real and just messing with us, but despite having been around since we put ochre to rock, we still can't help being baffled by the fact that static ...

Images that trick your brain and challenge your ability to perceive things are known as "optical illusions." There are three kinds of optical illusions: cognitive, physiological, and literal illusions ...

Think you have hawk eyes? Then find the hidden number expertly placed in this 3D optical illusion rug image in 7 seconds. Only 1% with hawk-eye vision and intelligence can do so. Are you one of those ...

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Optical illusions test the limits of human vision by deceiving our eyes and brain. A black-and-white spiral pattern hides a secret number, challenging viewers to find it within 5 seconds. The illusion ...

Vincent van Gogh’s The Starry Night is arguably the most famous and widely appreciated painting ever. But have you ever seen it move? Now you can, thanks to this wild, but simple, optical illusion.

Optical illusions take advantage of shortcomings in the visual system. Certain special designs can trick our brain as it’s trying to process the information that’s coming in. Learning more about what ...

Johannes holds an MSci in Neuroscience from King’s College London, where he worked on projects involving Alzheimer’s disease and Fragile X syndrome. NASA's Hubble Space Telescope has released a brand ...

A spiraling stairwell crowded with people creates an optical illusion in Nagoya-shi, Japan on May 3, 2015. (Kirill Ξ/Κ Voloshin /Flickr) Want to see your images in our Photo of the Day posts? Use ...