From the 'Moon Illusion' to 'The Dress', there have been many baffling optical illusions discovered ... the image actually remains black-and-white while your brain provides all the colour.

This optical illusion challenges viewers to spot a hidden word within swirling black-and-white patterns. This brain-teasing ...

This black-and-white illustration cleverly hides baby ... The article argues that solving such complex optical illusions can enhance cognitive skills and promote mental agility.