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 ...

Using ultra-fast laser pulses and special cameras, scientists have simulated an optical illusion that appears to defy Einstein's theory of special relativity. One consequence of special relativity is ...

A grayscale ballerina who appears to be moving. A human who can fit in a doll box. A black-and-white prism which appear to change shape when viewed from three different directions. Those are the top ...

If you have never seen an optical illusion, it is an image that makes you see things differently than they actually are. Optical illusions trick your eyes into believing you see something that is not ...

The world of optical illusions is not for the weak-minded. These visual illusions can trick your mind into seeing things that are not there and make you create assumptions that aren't true. These ...