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 are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...

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 ...

In this vibrant picture, you can see two boats with passengers on board. This extremely beautiful picture challenges you to find a face hidden in it. What makes this optical illusion difficult is ...