Now science wants to tell us that it's merely an optical illusion? That's the suggestion behind the argument that purple ...

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.

A fun Easter optical illusion. To add a touch of playful fun to the festivities, we have a new optical illusion for you to enjoy as Easter approaches. The image, created using Cha ...

A Brocken spectre optical illusion happens when a person's own shadow is projected onto low cloud, often surrounded by a rainbow halo. Lauren Wood, a mountain leader from Menai Bridge, Anglesey ...

THIS mind-boggling optical illusion is bound to get you scratching your head - especially since only 9% of people can spot the trick. Everyone can see see the iconic painting in black and white ...