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Knowledge Cats Dirty Minds
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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.

Squirrel Stereogram

Stereograms

Is this a bird or a rabbit?

Ambiguous illusions

Rainbows are illusions

Types of Optical Illusions

Laurel the Tree

An Ent named Laurel

Source/credit: Julien Delaval

This Stinking Laurel Tree lives in Fanal Forest, Madeira, a UNESCO World Heritage Site. The forest is known for its beautiful but eery atmosphere. The centuries-old laurel trees standing in the usual fog seem to have humanlike features.

More optical illusions:

Catfusion
Parking ramp
Giant Cat
Hidden ad in advertisement page
Cat portal
Floating helmet and wheel
Headless figure
Bushfire
  • Pareidolia
  • Physical illusions
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The eye of a cyber poppy

Cyber Poppy

Flowers

cactus rock climbing

Rock Climbing

Trees