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Knowledge

Facts, science and history of optical illusions.
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Bezold effect fabric

Bezold Effect

Is this a bird or a rabbit?

Ambiguous illusions

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

A sorrowful rock

sorrowful rock face pareidolia

Source/credit: Bruno Teste

In another classic case of pareidolia, this rock has a very sorrowful look. Who knows what it has seen in its lifetime already.
Bruno Teste, the photographer of this image, has compiled a collection of rock faces in his book Stonejinns 

 

More optical illusions:

The Grinch
Pipe Cleaner Arms
Live Wallpaper
Grumpy tree
Bird Strike
Rock Climbing
Howling Wolf
The Pensive Olive Tree
  • Pareidolia
  • Physical illusions
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mysterious tree pareidolia

Mysterious tree

Trees

Chili willies or peter peppers

Chili willies

a dirty mind