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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.

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

sorrowful rock face pareidolia

How do optical illusions work?

Expanding Black Hole Illusion

Mind-blowing facts about optical illusions

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:

Heavy Metal Concert
Calm Lake
Floating tree
This Patio
Cat in the bag
Sword-billed Hummingbird
Music Notes
Assorted Dried Beans
  • Pareidolia
  • Physical illusions
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A slate patio

This Patio

Floors

Sloped floor

Mind-boggling Floor

Floors