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Knowledge Cats Dirty Minds
hidden message Ghosts Geometry

Knowledge

Facts, science and history of optical illusions.
See all the articles or scroll down to see what you came for.

sorrowful rock face pareidolia

How do optical illusions work?

Forced perspective image Pisa tower

Forced Perspective

Is this a bird or a rabbit?

Ambiguous illusions

Broken bicycle

Bicycle reflection

Source/credit: remin

This broken bicycle looks perfectly fine in its reflection. This is because the bend in the wheel is exactly perpendicular to the reflection, creating an illusion of a full circle.

More optical illusions:

Camouflaged kitty
Bride Waterfall
Sand Bear
Grill Mod
Sexy Birch
Separation
Gravel flower bed
Crow
  • Pareidolia
  • Physical illusions
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Bushfire optical illusion

Bushfire

Trees

Dog head floating

Dog head floating

Dogs