Optical illusions, like the mesmerizing "wavy line" pattern, challenge human perception and offer surprising cognitive ...

THIS picture of black and white wavy lines could fetch £7.5million. Just looking at the confusing-looking piece for too long can give you a headache and that’s before the monster price tag is ...

Stare at this wavy black-and-white spiral for long enough ... This illusion, in particular, plays with spatial distortion, pattern interference, and visual confusion to create a “moving” effect where ...

Billy Yovanovich is convinced "square waves" created the mystery pattern that he saw on the Lina Island beach on Saturday, but Institute of Ocean Sciences researcher Richard Thomson is skeptical.