Humans are fascinated by visual illusions, which occur when there is a mismatch between the pattern of light that falls on the retina, and what we perceive. Before books, films, and the internet ...

While the photograph is authentic, the "underwater waterfall" is the result of an optical illusion. As explained in a CNN Travel story from August 2019, "Sand and silt on the ocean floor run off in a ...

In 350 BC, Aristotle reported seeing illusory movement after staring at a constantly moving stimulus. Later coined the "waterfall illusion," scientists are still investigating the properties of motion ...

Sunset creates 'firefall' illusion on Yosemite waterfall stream A waterfall cascading down a cliffside looked like rolling lava as the sun's reflection created an illusion on Yosemite's Horsetail Fall ...

Watching a real life version of Escher’s Impossible Waterfall melts my brain. The more I look at, the more confused I get! Thankfully, the secret on how the whole illusion works is out. There’s clear ...

Whether it is salt flats in Bolivia or rock formations in Arizona, nature never ceases to amaze.

A grayscale ballerina who appears to be moving. A human who can fit in a doll box. A black-and-white prism that appears to change shape when... Optical illusions are a brain feature, not a bug. Here's ...

A video has captured the rare "firefall" phenomenon at Yosemite National Park, where a waterfall appears to cascade molten lava. The video, taken on February 22, shows Yosemite's Horsetail waterfall ...

A waterfall cascading down a cliffside looked like rolling lava as the sun's reflection created an illusion on Yosemite's Horsetail Fall in California.