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These columns are straight (and not moving)
How to make an impossible two-legged chair
This image will disappear if you stare at it long enough
Computer finds faces in grains of sand
Optical illusion: Seeing color in a black-and-white image
Watch this cool demonstration of an Ames window
If you rotate this photo of a spaceship, it looks like a car in the water
These boxes aren't rotating. It's an optical illusion. Really.
Watch and rewatch this optical illusion to figure out how it's done
Is this a bird or a bunny?
Watch these cars and motorcycles drive into another dimension
Cool optical illusion – this diamond shape appears to move
Brilliant pet adoption posters
How to easily draw a fantastic optical illusion of a 3D city
If you stare at this image, it allegedly "disappears"
Watch this fantastic "Circle in Circle" optical illusion machine in action
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