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Knowledge Cats Dirty Minds
Clouds Color Constancy Objects

Knowledge

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

Billie Eilish drawn in 3D by Stephan Pabst

Anamorphic optical illusions

Expanding Black Hole Illusion

Mind-blowing facts about optical illusions

Prehistoric ambiguous illusion

The history of optical illusions in art

Pipe Cleaner Arms

Pipe cleaner Arms

Source/credit: Lobke Leijser

The white sweater with black stripe is very confusing. But if you look closely you can see that the girl doesn’t have pipecleaner arms, and distinguish between the sweater and the cat fur.

More optical illusions:

Heavy Metal Concert
Dog jumping over Manhattan
Cargo in the sky
Gravity hills
Bent over the desk
Toe socks?
Grid Illusion Shirt
How many?
  • Pareidolia
  • Physical illusions
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A starry night sky optical illusion

A Starry Night Sky

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Galaxy far away at Burning Man

A Galaxy Far Away

Nature