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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.

Billie Eilish drawn in 3D by Stephan Pabst

Anamorphic optical illusions

sorrowful rock face pareidolia

How do optical illusions work?

Can animals see optical illusions? Hosico cat shows it with optical illusion rug

Animals and optical illusions

This Patio

A slate patio

Source/credit: jgroves76

This slate patio really is flat.

More optical illusions:

Paperthin Building
Monkey Selfie
Grill Mod
Enormous cat napping
Cat portal
Freak of Nature
Plane Crash
Dude, where is my car?
  • Pareidolia
  • Physical illusions
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Exotic golden bird

Exotic Bird

Birds

The Pyramid of Khafre

Geometric Shapes

Buildings