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Knowledge Cats Dirty Minds
Camouflage and Mimicry Advertizing Refraction

Knowledge

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

The Dress blue black white gold

Color Constancy Illusions

Squirrel Stereogram

Stereograms

Bezold effect fabric

Bezold Effect

Shit music

Pigeons sitting on wires creating shit music

Source/credit: Guggenhein

These pigeons sitting on wires look like musical notes.

The song that these birds created seems very hard to play, and real shit music…. or is it sheet music?

More optical illusions:

A Festival for Ants
High-rise buidings
Floating tracks
Missing Chair Leg
Floating Baby Boy
Up or Down?
Firefall
Dead Man's Fingers
  • Pareidolia
  • Physical illusions
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This bird has teeth.

Smile!

Birds

Proof that birds are not real, and are spy drones

Birds are not Real

Birds