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Knowledge Cats Dirty Minds
Clouds Trees Shadows

Knowledge

Facts, science and history of optical illusions.
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Squirrel Stereogram

Stereograms

Is this a bird or a rabbit?

Ambiguous illusions

The Dress blue black white gold

Color Constancy Illusions

Beautiful Caterpillar

Caterpillar illusion

Source/credit: José Luis Rodríguez

This is an award-winning photograph of nine European Bee-eaters nestled onto a single branch together on a rainy May day.

 

More optical illusions:

Cat Head
Disappearing trailer
Boiling a bird
Pump it up!
Bald friends
A sorrowful rock
Escher drawing IRL
180 degrees
  • Pareidolia
  • Physical illusions
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Dogs sharing a mouth

Dogs

Snake cat

Snake cat

Cats