Optical illusion: What to do? The challenge, this time, is deceptively simple: find the word ‘ball’ hidden in a grid full of the word ‘bill’. At first glance, the puzzle looks like a repetition of the ...

Optical Illusion for Testing Your IQ: Optical illusions are usually mind-bending and shape-shifting images of an object or drawing or people that challenge the brain’s perception. There are various ...

Scientists at the California Institute of Technology have developed a visual illusion that they believe will help explain how human brains make sense of the world. The computer simulation shows how ...

Ready to have your mind irreversibly messed with? Prepared to spend a good few minutes squinting at your screen, confused and amazed? Rejoice then, because another brain-hurting optical illusion is ...