Both faces are grey, proving that not everything is black and white. The face optical illusion was created by the Japanese experimental psychologist and optical illusion creator Akiyoshi Kitaoka.

A Japanese professor, Kokichi Sugihara, created sculptures that trick the mind to see the impossible. He was the winner of the Best Illusion of the Year Contest in 2010 and 2nd place in 2016.

This fun optical illusion tests your ability to focus! The cluster of related words conceals a word. Within 7 seconds, identify the concealed word among these words. You have only 7 seconds to find it ...