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Knowledge

Facts, science and history of optical illusions.
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Forced perspective image Pisa tower

Forced Perspective

Locomotives in their natural habitat

Pareidolia (Seeing faces)

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

Grumpy tree

grumpy tree illusion pareidolia

Source/credit: Bruno Teste

In another classic case of pareidolia, you can easily see a grumpy tree. 

 

More optical illusions:

Howling Wolf
110 pound squirrel
Canoe in the Winter
Floor Color Creates Extra Dimension
Grill Mod
Up or Down?
Mesmerizing eye
Sunken police car
  • Pareidolia
  • Physical illusions
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Hand going through cat illusion

Hand through a cat

Cats

mysterious tree pareidolia

Mysterious tree

Trees