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Knowledge Cats Dirty Minds
Bicycles Nature Trees

Knowledge

Facts, science and history of optical illusions.
See all the articles or scroll down to see what you came for.

Locomotives in their natural habitat

Pareidolia (Seeing faces)

Squirrel Stereogram

Stereograms

Parallax effect

Parallax Effect

90s Yellow Pages Ad

Credit: DJ Flooring in Yellow Pages

Thanks to this real Yellow Pages advertisement, DJ Flooring in Brighton, UK, had to change their phone number. 

Discontinued Yellow Pages advert with dirty optical illusion

However, the image used in the ad has been around longer than that. It was a popular image in the 90s used by many businesses to grab attention.

Popular illusion in 90s advertising

More optical illusions:

Apartment on fire
Shit music
Impossible woodwork
Tetanus Rainbow
Escher drawing IRL
Pup Patrol
Hidden cat
Giant Broccoli
  • Pareidolia
  • Physical illusions
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Poodle on the beach

Poodle or Cocker Spaniel?

a dirty mind

A giant bullfrog in Texas

Giant bullfrog

Animals