Knowledge

Facts, science and history of optical illusions.
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Parallax Effect

Stereograms

Can animals see optical illusions? Hosico cat shows it with optical illusion rug

Animals and optical illusions

Wind turbines

Source/credit: gsuhrie

What happened in this photo is that it was a long exposure photo. The blades have become invisible, and the shadows of the poles are cast onto the blades instead of just in the sky.

More optical illusions:

Screaming up or down?

Hidden cat

Cats

Glitch in the Matrix

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