This brain-frazzling optical illusion is enough to put your head into a spin. The purple-and-yellow image looks as though it’s both three-dimensional and moving but is in fact stationary and flat.

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. The Vienna team stitched together slices of light to create snapshots. At rest (left), the cube looks normal. But when simulated ...

Optical illusions aren’t just playful tricks. They often hint at how your brain works beneath the surface. Take this puzzle, for instance. It is one of the most amusing optical illusions in psychology ...

You look at an image of a black circle on a grid of circular dots. It resembles a hole burned into a piece of white mesh material, although it’s actually a flat, stationary image on a screen or piece ...

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