For those that love optical illusions – and a good explanation for the mind-bending properties of them – finding one you haven't seen before is a real treat. And that's just happened with this (I ...

Are you self-confident or overanalytical? There will be two elements in the picture, and depending on the first thing that ...

Today’s optical illusion is challenging viewers to find a hidden "5" among a sea of "2s." The tricky pattern plays with human perception, making it hard to spot the odd number. Can you find it?

Our brain and eyes can play tricks on us—not least when it comes to the expanding hole illusion. A new computational model ...