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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.

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

Squirrel Stereogram

Stereograms

Rainbows are illusions

Types of Optical Illusions

4 people

4 people but only 3 arms

Source/credit: BalrogBunghole

In this optical illusion, there are 4 people. The person on the left is wearing a camo jacket that really does its job.
Look at the four bottles and find the arms attached to it.

More optical illusions:

Ent walking
Hole in Cat
Camouflaged kitty
One armed cat
Ghost Cat
Monkey Selfie
Toe socks?
Big Seagull
  • Pareidolia
  • Physical illusions
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Black cat looks like a shadow

Shadow

Cats

Reflective bird

Reflective bird

Birds