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Knowledge

Facts, science and history of optical illusions.
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Can animals see optical illusions? Hosico cat shows it with optical illusion rug

Animals and optical illusions

Bezold effect fabric

Bezold Effect

Rainbows are illusions

Types of Optical Illusions

Troll in Allegany State Park

troll in the park

Source/credit: spacemanspiff8655

This troll in Allegany State Park in New York has turned into stone. 

Mimetoliths are rocks that appear to take on familiar shapes, due to pareidolia.

More optical illusions:

A Beard Model
Misaligned Arrow
Dog Log
A Lego bed
Fight against Cervical Cancer
Grid Illusion Shirt
Heavy Metal Concert
Floating either way
  • Pareidolia
  • Physical illusions
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Hidden Message

AI

Prehistoric snake

Prehistoric Snake

Rocks