Can you find the odd rainbow in 5 seconds? Test your observation skills with this quick optical illusion challenge. Your time starts now! Check the image carefully. Have you found the different ...

This optical illusion personality test might have the ... Scroll down to see what your choice reveals! If you chose the ...

A moth found in northern Australia and South-East Asia has an astonishing camouflage trick: it creates an optical illusion to look ... such as the colours of the rainbow on a bubble.

A rainbow is a full circle, but from the ground, we only see part of the arc. The “end” that seems to touch the earth is an optical illusion that changes based on the observer’s position.