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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.

Parallax effect

Parallax Effect

Prehistoric ambiguous illusion

The history of optical illusions in art

Rainbows are illusions

Types of Optical Illusions

Dead Man’s Fingers

This fungus is named Xylaria polymorpha, but more commonly known as dead man's fingers. This example is a perfect illusion, with 5 digits and more shaped like a hand than other specimens. It really looks like a zombie is going to rise up from the ground.

Source/credit: DrFetusRN

This fungus is named Xylaria polymorpha, but more commonly known as dead man’s fingers. This example is a perfect illusion, with 5 digits and more shaped like a hand than other specimens. It really looks like a zombie is going to rise up from the ground.

 

More optical illusions:

Dog Log
Hole in Cat
Next to the boat
Giant Cat
Baby Bigfoot
Headless Man
Elvish Writing
Giant Ship
  • Pareidolia
  • Physical illusions
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This tetanus rainbow was created without Photoshop tricks. The photographer chose the right forced perspective (and an ultra-wide angle).

Tetanus Rainbow

Objects

A woman bent over a desk with her big butt in view

Bent over the desk

a dirty mind