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Knowledge

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

Bezold Effect

Locomotives in their natural habitat

Pareidolia (Seeing faces)

Squirrel Stereogram

Stereograms

Mysterious tree

mysterious tree pareidolia

Source/credit: Bruno Teste

In another classic case of pareidolia, this mysterious tree seems to possess some secret knowledge. 

 

More optical illusions:

UFO
Shadow cat
Stretchy Cat
Fight against Cervical Cancer
4 people
Migrating horses
Camouflaged kitty
Floating either way
  • Pareidolia
  • Physical illusions
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grumpy tree illusion pareidolia

Grumpy tree

Trees

sorrowful rock face pareidolia

A sorrowful rock

Nature