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Knowledge

Facts, science and history of optical illusions.
See all the articles or scroll down to see what you came for.

Squirrel Stereogram

Stereograms

Forced perspective image Pisa tower

Forced Perspective

Rainbows are illusions

Types of Optical Illusions

Cat defies gravity

cat defies gravity

Source/credit: pedroburon

This physical optical illusion is caused by a reflection. The cat is sitting on the left side of the glass door, while the box is placed on the right side of the door.
The reflection perfectly places the cat in the box.

More optical illusions:

Blueberries
Flying through the woods
Shadow
Big Bird
Broken Chair
Hand through a cat
Beach Yeti
Phoenix rising
  • Pareidolia
  • Physical illusions
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cat in box optical illusion

If it fits…

Cats

That's the cat's pajamas

Thats the cat’s pajamas

Cats