Every winter Yosemite National Park becomes the stage for one of nature’s most riveting optical illusions: a magnificent waterfall that for a brief moment appears to be made of pure golden fire.

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 ...

Optical illusions occur naturally in different habitats and conditions across the world. Cloud formations can sometimes make it seem like there's an ocean or a UFO in the sky. Whether it is salt flats ...

We all love a good magic trick. And illusions have always drawn us in. The shimmer of a desert mirage, the flicker of shadows in Plato’s cave, or even my father's rather simple sleight of hand that ...

Add Yahoo as a preferred source to see more of our stories on Google. Researchers are finding that many of them do experience these perceptual quirks, though not always in the same way. "Illusions ...