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Knowledge Cats Dirty Minds
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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.

Expanding Black Hole Illusion

Mind-blowing facts about optical illusions

Squirrel Stereogram

Stereograms

sorrowful rock face pareidolia

How do optical illusions work?

Deadly stairs

These deadly stairs look wrong for a second, until you blink. If you can see it only in one way, just scroll up and down and you will see the other way appear.

Credit: defCONCEPT

These deadly stairs look wrong for a second, until you blink. If you can see it only in one way, just scroll up and down and you will see the other way appear.

 

More optical illusions:

Eyeglasses
Water drop
How many?
What big mouth you have!
Transparent Car Key
Lake View Garden
Screw hole
Dogs sharing a mouth
  • Pareidolia
  • Physical illusions
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This man with glasses in front of a woman is her only fan. The image is a very dirty optical illusion. Or is it your mind?

Her Only Fan

a dirty mind

Strained Expression

Objects