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

This article presents an optical illusion challenge: find a cleverly hidden chameleon among colorful hydrangea flowers within ...

An Optical Illusion is a type of puzzle, which is often required different thinking and logical skill to solve these types of ...

Do you think you have sharp eyes? Try this optical illusion IQ test and spot the hidden needle without getting distracted by the tortoise-and-rabbit race. Only 25 seconds to check how strong your ...

Optical illusions have gained a lot of popularity recently, as they get our brain to exercise, and can be the perfect test of ...

Optical illusions occur naturally in different habitats and conditions across the world. Cloud formations can sometimes make it seem like there's an ocean or a UFO in the sky. Whether it is salt flats ...

Medical imaging experts are adept at solving common optical illusions, according to new research. The research is the first to show that people can be trained to do better at solving visual illusions, ...

Optical illusions have gained a lot of popularity recently, as they get our brain to exercise, and can be the perfect test of ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Andriy Onufriyenko via Getty Images Though optical illusions come in all shapes and ...

In this Ebbinghaus illusion of relative size perception, the orange circle on the left looks bigger than the one on the right - but it is actually 10 per cent smaller. In a new study, medical imaging ...