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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.

Prehistoric ambiguous illusion

The history of optical illusions in art

Billie Eilish drawn in 3D by Stephan Pabst

Anamorphic optical illusions

Is this a bird or a rabbit?

Ambiguous illusions

Cat Anus

Cat anus

Source/credit: dreadware8

The cat is obviously laying on a pipe, but at first glance you might think you are looking at the cat’s anus.

More optical illusions:

A Little Army
Transparent Car Key
Horse Head
Impossible woodwork
Mind-boggling Floor
Cat with a Hole
Pipe Cleaner Arms
Impaled windshield
  • Pareidolia
  • Physical illusions
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