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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.

Expanding Black Hole Illusion

Mind-blowing facts about optical illusions

Is this a bird or a rabbit?

Ambiguous illusions

Can animals see optical illusions? Hosico cat shows it with optical illusion rug

Animals and optical illusions

Echidna kitten

Source/credit: THEULTRAVIOLENTDROOG

Wouldn’t you want to have an echidna kitten? This cute black kitten or Void looks like it has a beak, creating the optical illusion of a bird, or even an echidna (an egg-laying Australian mammal). 

Echidna

More optical illusions:

Sword-billed Hummingbird
Shadow
Giant Cat
Disappearing trailer
Sand Bear
Baby Bigfoot
A Galaxy Far Away
Bushfire
  • Pareidolia
  • Physical illusions
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The handles of a box with a bin in it creates a sexy optical illusion. It looks like this lady got very excited about bins.

Excited about bins

a dirty mind

This cat portal has just opened up in the television. Or is it just an optical illusion?

Cat portal

Cats