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Knowledge

Facts, science and history of optical illusions.
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The Dress blue black white gold

Color Constancy Illusions

Expanding Black Hole Illusion

Mind-blowing facts about optical illusions

Bezold effect fabric

Bezold Effect

Trippy Stairs

Mirror Step by Derek Paul Boyle

Source/credit: Booooooom

This is an art installation by Derek Paul Boyle and features a mirror step on outdoor stairs.
(It may be art, but can potentially cause many problems; slipping, tripping and upskirt voyeurism.)

More optical illusions:

Flying through the woods
Crow
Absolutely impossible
Calm Lake
Giant Christmas Cat
Stretchy Cat
Hidden ad in advertisement page
Goal perspective
  • Pareidolia
  • Physical illusions
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Cat with a hole in its body

Cat with a Hole

Cats

Sexy Birch Tree

Sexy Birch

a dirty mind