In today’s optical illusion challenge, only 1% of people with sharp vision can spot the hidden number '99' among a sea of '96 ...

A woman has described the "breath-taking" experience of seeing a rare ghostly shadow phenomenon while out walking. A Brocken spectre optical illusion happens when a person's own shadow is projected ...

This optical illusion is a fantastic way to test your observation skills. If you managed to find all the 5s, ...

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, ...