Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: rastroboy via ...

A new optical illusion is putting people’s eyesight - and patience - to the test. The challenge looks simple at first glance: a full grid of the number 349 repeated over and over. But hidden somewhere ...

Illusion is derived from the Latin verb illudere, which means to mock or trick. Optical illusion pictures are designed to trick the human mind and are regarded as one of the simplest tests to ...