The Expanding Hole illusion has been around for a while and never fails to mesmerise. In a study, researchers showed this illusion to 50 participants. For a whopping 86% of them, the black "hole ...

Optical illusion leaves internet stumped ... characterised by their light grey-white bark and vertical texture, have dark oval holes that could either be woodpecker holes or natural cavities ...

Take a look here at the puzzle: The post was shared with a caption that reads: "Optical Illusion Test: People with good observation skills can solve this optical illusion test. Only 5% of people ...

Dr Chris and Dr Xand teach you how to trick your eyes with an optical illusion that's more than it ... Dr Chris drew a mole on one circle and hole on the other. Dr Xand drew a loo and a poo!