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Knowledge Cats Dirty Minds
Snakes Mirrors Stairs

Knowledge

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

Forced perspective image Pisa tower

Forced Perspective

Is this a bird or a rabbit?

Ambiguous illusions

Locomotives in their natural habitat

Pareidolia (Seeing faces)

Shadow cat

Video credit:

The black cat does its best to hide as a shadow behind the other cat. But there is only so long that he can keep up.

More optical illusions:

Cat with a Hole
Magnus the Impaled
Water drop
Impaled windshield
Bent over the desk
Howling Wolf
Fight against Cervical Cancer
The Grinch
  • Pareidolia
  • Physical illusions
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This camouflaged kitty is hiding very well on the wooden floor. 

Camouflaged kitty

Cats

This photo is upside down. It is a nearly submerged SUV in a lake with many bystanders.  After this image was first posted to Reddit in January 2020, it has become a popular meme with the caption: "The difference between a UFO and a female driver is 180 degrees."

180 degrees

Cars