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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.

Expanding Black Hole Illusion

Mind-blowing facts about optical illusions

Billie Eilish drawn in 3D by Stephan Pabst

Anamorphic optical illusions

Locomotives in their natural habitat

Pareidolia (Seeing faces)

Flapping in the wind

Curtains flapping in the wind

Source/credit: Henu3gumb

These curtains are flapping in the wind. But your dirty mind may be reminded of something else.

More optical illusions:

Magnus the Impaled
Cargo in the sky
Freak of Nature
Smile!
Afro tree
Cup Half Full
Big Bird
Boiling a bird
  • Pareidolia
  • Physical illusions
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Dog with bone

Bone

a dirty mind

Hidden cat

Cats