Optical illusions that challenge you to find the hidden animals are a real test of observation and attention to detail. To solve this optical illusion, all you need is to spot the hidden cat in the ...

A quick optical illusion puzzle that tests attention to detail and visual focus by asking readers to find a hidden odd number.

Look at this optical illusion picture. Three happy girls stand together holding hands. They are wearing white headcovers, ...

Martin Doherty received funding from the British Academy/Leverhulme Trust who partially supported this work. He continues to receive funding from the Leverhulme Trust. Radoslaw Wincza does not work ...