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Knowledge

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

Bezold effect fabric

Bezold Effect

Rorscharch inkblot

What Optical Illusions Reveal about You

Locomotives in their natural habitat

Pareidolia (Seeing faces)

Cat a log

Find the cat
Source/credit: waterhauler

The cat looks like a piece of firewood.
Middle stack, second piece of firewood from the top is not made of wood, but a light-orange tabby cat.

More optical illusions:

Live Wallpaper
Fight against Cervical Cancer
Dock to the sky
Strained Expression
Bird Strike
Pump it up!
Hidden cat
Sunken police car
  • Pareidolia
  • Physical illusions
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Street in Macau

The Invasion

Buildings

Elvish writing

Elvish Writing

Objects