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Knowledge Cats Dirty Minds
Geometry Floors Flowers

Knowledge

Facts, science and history of optical illusions.
See all the articles or scroll down to see what you came for.

Prehistoric ambiguous illusion

The history of optical illusions in art

sorrowful rock face pareidolia

How do optical illusions work?

Forced perspective image Pisa tower

Forced Perspective

Illuminati

Illuminati eye in the ceiling

Source/credit: Rushmerphotography

The shadow of the lampshade and lamp.

More optical illusions:

Big dog
Dog head floating
Stretchy Cat
Giant lamps
Magayon and Pangaronon
Rock Climbing
Bent over the desk
Swamp monster
  • Pareidolia
  • Physical illusions
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Grate view of Central Park

Grate View of Central Park

Buildings

Ghost boat

Ghost Boat

Boats