Expand the image above to fill your screen and stare at the black blob in the center. (You can also find the original version here.) Most people perceive the blob as ...

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 ...

Our pick of the best optical illusions of all time will leave you amazed and confused in equal measure.

The “expanding black hole” is an illusion new to science because it can prompt your pupils to dilate in anticipation of entering a dark space. When you look at an optical illusion, you might feel it ...

A mathematician says the Parthenon's famous optical illusion may never have existed, challenging an old myth about ancient Greek design.

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 ...

When Dimitris Papailiopoulos first asked ChatGPT to interpret colors in images, he was thinking about “the dress”—the notoriously confusing optical-illusion photograph that took the Internet by storm ...