Hidden number and letter optical illusions are some of the most satisfying puzzles because they look unbelievably simple ...

Optical illusions come in all forms, from simple tricks of the eye to complex geometric designs, but my personal favourites are the simple illusions that leave my brain well and truly frazzled. While ...

Optical illusions come in all forms, from mind-melting artwork to photography trickery, but there's one style that never fails to perplex the internet – the humble colour illusion. Fooling the brain ...

At first glance, a uniform array of the number '1' offers little intrigue, but delve deeper and you'll reveal a lone letter ...

You have to see it to believe it, they say. But can we really trust our eyes? The answer is not quite. It was found that our eyes can trick our brains into believing things that aren’t there and vice ...