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 ...

THIS mind-boggling optical illusion is bound to get you scratching your head - especially since only 9% of people can spot the trick. Everyone can see see the iconic painting in black and white ...

Test your observation skills with this optical illusion challenge! Spot the hidden owl in a pattern of birch trees.

Don't believe your eyes in this eye-popping experiment! Dr Chris and Dr Xand teach you how to trick your eyes with an optical illusion that's more than it seems! Step 1: If using, get a grown-up ...