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Knowledge Cats Dirty Minds
Stairs Color Constancy Forced Perspective

Knowledge

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

Squirrel Stereogram

Stereograms

Rorscharch inkblot

What Optical Illusions Reveal about You

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

Phoenix rising

This is the volcano Mount Etna in Sicily erupting. The bright lava against an almost invisible mountain looks like a Phoenix (or Mutalisk)

Source/credit: honkay

This is the volcano Mount Etna in Sicily erupting. The bright lava against an almost invisible mountain looks like a Phoenix (or Mutalisk)

More optical illusions:

Floating either way
Canoe in the Winter
Pixeled sky
Door handle
Aerial View of a Beach
Eye of a tree
The same image
Dead Man's Fingers
  • Pareidolia
  • Physical illusions
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Knot of snakes illusion by the atticus atlas moth.

Knot of snakes

Snakes

Cliff at great heights above a highway at Gulek Castle, Turkey.

Great heights

Landmarks