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Knowledge Cats Dirty Minds
Snakes AI Cars

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

sorrowful rock face pareidolia

How do optical illusions work?

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

Geometric Shapes

The Pyramid of Khafre

Source/credit: Giza 3D Survey

These geometric shapes are actually the Pyramid of Khafre at Giza seen from directly overhead.

More optical illusions:

Puffy Face
Parked too long?
Tetanus Rainbow
Tsunami in Ohio
Square Fire Hydrant
Dog Head Mount
Pixeled sky
Eye of God
  • Pareidolia
  • Physical illusions
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A slate patio

This Patio

Floors

Sloped floor

Mind-boggling Floor

Floors