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Knowledge Cats Dirty Minds
Ambiguous hidden message Depth Reversion

Knowledge

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

Is this a bird or a rabbit?

Ambiguous illusions

Squirrel Stereogram

Stereograms

Expanding Black Hole Illusion

Mind-blowing facts about optical illusions

Impossible Chairs

Impossible stack of chairs

Source/credit: Nicolas E. Scott-Samuel

These impossible chairs are really just a stack of 9 chairs leaning against a wall. A research paper was written on this real life illusion. 

More optical illusions:

Dog jumping over Manhattan
Erased Street Art
Sword-billed Hummingbird
Dinosaur Bird
Flying Cargo Ship
Migrating horses
Up or Down?
Headless Man
  • Pareidolia
  • Physical illusions
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Tornado icicle

Winter Tornado

Nature

A dock to the sky

Dock to the sky

Nature