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Knowledge Cats Dirty Minds
UFOs Floors Boats

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

sorrowful rock face pareidolia

How do optical illusions work?

Prehistoric ambiguous illusion

The history of optical illusions in art

Trees wearing a tutu

Floating Ice

Source/credit: Ohh_Hai_Dere

Trees wearing a tutu is obviously ridiculous. But it might not be immediately obvious what you are looking at in this illusion.
The tutus is actually sheets of ice stuck to trees after a flood. When the water receded, the ice remained suspended midair.

More optical illusions:

Headless player
A Festival for Ants
Shadow
Flying Dutchman
Paperthin Building
Ghost Boat
Afro tree
Angel
  • Pareidolia
  • Physical illusions
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